第一篇：情態(tài)動(dòng)詞need用法小結(jié)

一、NEED與句子類型

（本條可參照ANY的用法。）NEED可用于：

1.否定句/含有否定意義的句子 1)否定句

含not/hardly/never/nobody等詞語(yǔ)。I needn’t say anything.He need hardly advise me.You never need tell me this or that.Nobody need help me.I don’t think he need come.（否定轉(zhuǎn)移）

注：NEEDN’T的意思其實(shí)有三種，即不必要/不一定/不應(yīng)該，視具體語(yǔ)境而定。2)含有否定意義的句子

含only/but/all/before/than等詞語(yǔ)。He need only wait here.You need but consider the matter to understand its importance.That’s all that need be said.Do not stay longer than you need.There was another hour before I need go out into the cold.2.疑問(wèn)句/表示疑問(wèn)的從句 1)疑問(wèn)句（包括否定疑問(wèn)句）Need he say it again? 2)表示疑問(wèn)的從句

I wonder whether/if I need see her.3.條件句

含if/unless等詞。

If he need come, he will.本條要點(diǎn)簡(jiǎn)單概括起來(lái)就是，NEED不能用于肯定句。以下的各種用法也遵循這條規(guī)則。

二、NEED與時(shí)態(tài) 1.現(xiàn)在時(shí)

NEED常用于現(xiàn)在時(shí)。You needn’t stay.2.將來(lái)時(shí)

You needn’t have your blood pressure taken tomorrow.3.過(guò)去時(shí)

NEED的過(guò)去式仍然是NEED。1)過(guò)去時(shí)間由一過(guò)去時(shí)間狀語(yǔ)表示 He need not come yesterday.2)過(guò)去時(shí)間由另一過(guò)去時(shí)動(dòng)詞表示。All he need do was to inquire.It was clear that he need never trouble to get up at seven again.I told him he needn’t be in a terrible fix.注：表示過(guò)去的NEED常用于間接引語(yǔ)中。（本條可參照must的用法）

三、NEED與虛擬語(yǔ)氣 1)NEED用于虛擬條件句

（本條可參照虛擬條件句的構(gòu)成及用法。）If money were useless, we need not struggle for it.If you had been careful enough, you need not have suffered.注：本條用法較為少見(jiàn)。

2)NEED單獨(dú)使用：NEEDN’T HAVE DONE（本條可參照SHOULDN’T HAVE DONE的用法。）You need not have worried.注：NEED HAVE DONE的形式較為少見(jiàn)

Need you have scolded him so severely for his bad work? He had done his best.（否定意味）

He need have gone and sent that letter in person.（實(shí)際上沒(méi)有做）

四、NEED與推測(cè)

NEEDN’T表示“不一定”。（本條可參照must/can的用法。）1)NEEDN’T+BE

It needn’t be hot in Florida now.對(duì)比：

It can’t be hot in Florida now.（一定不）It must be hot in Florida now.（一定）2)NEEDN’T+HAVE DONE

He need not have seen much of the world, though he is an old man.對(duì)比：

He can’t have seen much of the world, for he is just a little boy.He must have seen much of the world, for he has been traveling so widely.五、NEED與問(wèn)句 1)反意疑問(wèn)句的構(gòu)成 You needn’t go, need you? 2)答句的構(gòu)成---Need he go?---Yes, he must/has to/needs to.---No, he needn’t.（本條可參照must的用法）

六、情態(tài)動(dòng)詞NEED與實(shí)義動(dòng)詞NEED 1)使用范圍

作為實(shí)義動(dòng)詞的NEED有人稱、數(shù)和時(shí)態(tài)的變化，使用范圍更為廣泛，不受句子類型和時(shí)態(tài)的限制。在肯定句、過(guò)去時(shí)和將來(lái)時(shí)的句子中，一般使用作為實(shí)義動(dòng)詞的NEED。

He needs to see a doctor straightaway.（此處needs to不能換做need，因?yàn)楸揪涫强隙ň洌?/p>

Will he need to start earlier? 注：

NEED TO BE DONE與NEED DOING可以互換，后者更為常用（這里的NEED均為實(shí)義動(dòng)詞）。2)含義差別

NEEDN’T HAVE DONE與DIDN’T NEED TO DO表示“不必要”的時(shí)候，在意義上有所差別，前者表示“本不必做??”，實(shí)際上已經(jīng)做了（NEED為情態(tài)動(dòng)詞）；后者單純地表示“不必做??”（NEED為實(shí)義動(dòng)詞）。

第二篇：情態(tài)動(dòng)詞的基本用法

情態(tài)動(dòng)詞的基本用法

情態(tài)動(dòng)詞的特點(diǎn)

1.沒(méi)有人稱和數(shù)的變化。

2.有些情態(tài)動(dòng)詞有過(guò)去式的變化：

will → would , can → could , may→ might , dare → dared

can(could)

1.表示能力。

Two eyes can see more than one.2.表示允許。

Can I have a look at your new pen?

Can(Could)you lend me a hand?

3.表驚異、懷疑、不相信等態(tài)度。主要用于否定句、疑問(wèn)句或感嘆句中。

Where can(could)they have gone to?

He can’t(couldn’t)be over sixty.How can you be so careless?

4.表示猜測(cè)(肯定句把握較??；否定句幾乎為100%把握)

The temperature can fall to 10℃.You can’t be serious.may(might)

1．表允許，might是may的過(guò)去式;用在疑問(wèn)中比may委婉、客氣。

You may take whatever you like.He told me that I might smoke in the room.2.表可能（事實(shí)上）。語(yǔ)氣不肯定。

He may be at home.他可能在家。

She may not know about it.I am afraid they might not agree with him.They might be having a meeting, but I’m not sure.must

1.表必須（主觀意志）

We must do everything we can to help him.You mustn’t talk to her like that.--Must we hand in our exercise books now?

--No, you needn’t./ No, you don’t have to.2.表示很有把握的推斷，意為“想必、準(zhǔn)是、一定”等，只用于肯定句。have(has)to：

have(has)got to 必須, 不得不。過(guò)去式為had to。

He must be ill.He looks so pale.She must have a lot of money, for she drives a BMW.shall

1.表征詢意見(jiàn)，用于第一、第三人稱疑問(wèn)句。

Shall I get you some tea?

Shall the boy wait outside?

It's a fine day.Let's go fishing, shall we?

2.表說(shuō)話人的意愿，有“命令、允諾、警告、決心”等意思，用于第二、第三人稱陳述句。

You shall do as I say.（命令）

You shall have the English book as soon as I finish it.（允諾）

He shall be sorry for it one day, I tell you.（警告）

Everything that he owns shall be taken away from him.（決心）

will

1.表意愿，用于各種人稱陳述句。

I will do anything for you.If you will read the book, I’ll lend it to you.2.表請(qǐng)求，用于疑問(wèn)句。

Don't smoke in the meeting room, will you?

Won’t you drink some more coffee? 3.表示某種傾向或習(xí)慣性動(dòng)作。

Fish will die out of water.The door won’t open.would

1.表意愿。

They would not let him in because he was poorly dressed.2.表委婉地提出請(qǐng)求、建議或看法。

Would you like another glass of beer?

3.表過(guò)去反復(fù)發(fā)生的動(dòng)作或過(guò)去的一種傾向。

Every time she was in trouble, she would go to him for help.should

1.表義務(wù)。意為“應(yīng)該”，用于各種人稱。

You should listen to the doctor's advice.你應(yīng)該聽(tīng)從醫(yī)生建議的。

You should study the article carefully.你應(yīng)該仔細(xì)讀那篇文章。

2.表推測(cè)，意為“想必一定、照說(shuō)應(yīng)該、估計(jì)”等。

The film should be very good as it is starring first-class actors.那部電影想必很棒，都是一流的演員。

They should be home by now.現(xiàn)在他們應(yīng)該已經(jīng)到家了 ought to

1.意為“應(yīng)該”，口氣比should稍重。

Ought you to smoke so much? 你應(yīng)該抽這樣多煙嗎？

You ought to write to the mayor.您應(yīng)該給市長(zhǎng)寫(xiě)信。

2.表推測(cè)，暗含很大的可能。

She ought to know his telephone number.她應(yīng)該知道他的電話號(hào)碼。

used to

過(guò)去常常, 現(xiàn)在不復(fù)發(fā)生或存在。

The Greeks used to worship several gods.過(guò)去,希臘人崇奉好幾種神。

He used to smoke.他過(guò)去抽煙（現(xiàn)在不抽了）。

情態(tài)動(dòng)詞的推測(cè)用法

⒈ 肯定句中：

must(一定)，may(可能)，might/could(也許，或許)其語(yǔ)氣的肯定程度依次遞減。其中，might 和could并非過(guò)去時(shí)態(tài)，只是語(yǔ)氣較為委婉或可能性較小 ⑴ 對(duì)當(dāng)前行為、情況或狀態(tài)的推測(cè)：

must /may /might /could + do/be

He must/may/might/could be in the reading room.他肯定/可能/也許在閱覽室里。

I must look funny in this hat.我戴這頂帽子看起來(lái)一定很滑稽。

⑵ 對(duì)此時(shí)此刻正在進(jìn)行的動(dòng)作的推測(cè)：

must /may/ might/ could + be doing

想必/可能正在……

He must /may/ might/ could be watching TV at this time.他此時(shí)一定/可能/或許在看電視。

They must be waiting for us.他們肯定在等著我們。

⑶ 對(duì)過(guò)去發(fā)生的事情的推測(cè)：

must /may /might /could + have +過(guò)去分詞

想必/可能已經(jīng)……

They must have arrived by now.現(xiàn)在他們肯定已到了。

You look very tired.You must have stayed up last night.看上去你很疲勞，你昨晚一定熬夜了。

You may have read about it in the papers.你可能在報(bào)上已讀到這件事了。

⑷ 過(guò)去的一段時(shí)間內(nèi)一直在進(jìn)行的動(dòng)作：

must/may /might/ could + have + been +doing

想必/可能一直在……

They are sweating all over.They must have been working in the fields.他們渾身是汗，準(zhǔn)是在地里勞動(dòng)來(lái)著。

He may have been waiting for us for an hour.他可能等我們一小時(shí)了。

2．否定句中：

can/could not

不可能，想必不會(huì)

may/might not

可能不

⑴對(duì)當(dāng)前行為、情況或狀態(tài)的推測(cè)：

can/could not+動(dòng)詞原形

不可能，想必不會(huì)

may/might not +動(dòng)詞原形

可能不

He may not be busy now.也許他現(xiàn)在不忙。

He can not be busy now.他現(xiàn)在一定不忙。

He can’t be in the reading room.I saw him on the playground just now.他不可能在閱覽室里，我剛看到他在操場(chǎng)上。

⑵對(duì)此時(shí)此刻正在進(jìn)行的動(dòng)作的推測(cè)：

can/could not + be doing

不可能，想必不會(huì)在干某事

may/might not + be doing

可能沒(méi)在干某事

They can’t be telling the truth.他們不可能在說(shuō)真話。

They may not be telling the truth.他們可能沒(méi)在說(shuō)真話。

⑶對(duì)過(guò)去發(fā)生的事情的推測(cè)：

can/could not + have +過(guò)去分詞

不可能，想必不會(huì)做過(guò)某事

may/might not + have +過(guò)去分詞

可能沒(méi)干過(guò)某事

He can’t have finished the work so soon.這項(xiàng)工作他不可能完成得這樣快。

He may not have achieved all his aims.But his effort is a good one.他可能沒(méi)達(dá)到他的全部目的，但他還是認(rèn)真做了努力的。

⑷過(guò)去的一段時(shí)間內(nèi)一直在進(jìn)行的動(dòng)作：

can’t /couldn’t/may not have been doing

He can’t have been waiting for us so long.他不可能等我們那么長(zhǎng)時(shí)間。

3．疑問(wèn)句中：

常用can/could來(lái)表示說(shuō)話人的猜疑、懷疑或不肯定的語(yǔ)氣

⑴ 對(duì)當(dāng)前行為、情況或狀態(tài)的推測(cè)：

can/could + 主語(yǔ)+ do/be

Where can he be now?

他現(xiàn)在會(huì)在哪里呢？

Can it be true?

那會(huì)是真的嗎？

⑵ 對(duì)此時(shí)此刻正在進(jìn)行的動(dòng)作的推測(cè)：

can/could +主語(yǔ)+ be doing

It’s so late.Can Tom be reading?

這么晚了，湯姆還在看書(shū)嗎？

What can he be doing?

他可能在做什么呢？

⑶ 對(duì)過(guò)去發(fā)生的事情的推測(cè)：

can/could +主語(yǔ)+have done

Can she have told a lie?

她會(huì)不會(huì)說(shuō)謊了？

Where can she have gone?

她會(huì)上哪兒去了呢？

情態(tài)動(dòng)詞的辨析

need和dare

1.用作情態(tài)動(dòng)詞

Need he go yesterday? 昨天他有去的必要嗎?

I don’t think you need worry.She dare not go out alone at night.How dare you say I’m unfair?

2.用作實(shí)義動(dòng)詞

She needs the work done before tomorrow.她必須在明天以前找人完成這項(xiàng)工作。

The table needs painting(to be painted.).I dare say he’ll come again.can 和be able to

be able to 表示經(jīng)過(guò)努力后, 能夠做到;be able to 有多種形式的變化。

can

1.表示體力或腦力方面的能力;

2.表示允許、可能性。

could 是can的過(guò)去式, 表示過(guò)去有能力及過(guò)去存在的可能性；用于疑問(wèn)句表示委婉地

提出問(wèn)題。

1.The fire spread through the hotel very quickly but everyone was able to get out.2.—Will you stay for lunch?

—Sorry, I can’t.My brother is coming to see me.must和have to

must表示主觀意志，而have to表示由于客觀因素。

I told her that she must give up smoking.We had to get everything ready that night.would和used to

1）used to “過(guò)去常?！? 與現(xiàn)在事實(shí)相反;would表過(guò)去意愿。

People used to think that the earth was flat.She would go out for a walk in the morning when she was in the country.1．情態(tài)動(dòng)詞無(wú)論是表達(dá)“推測(cè)和可能性”，還是表達(dá)“虛擬”這一概念，只要是對(duì)過(guò)去

已經(jīng)發(fā)生的事

情進(jìn)行描述，一律用“情態(tài)動(dòng)詞+have done”這一結(jié)構(gòu)；對(duì)現(xiàn)在或?qū)?lái)的事情進(jìn)行

描述，用“情態(tài)

動(dòng)詞+動(dòng)詞或系動(dòng)詞原形”。

2．should(not)/ ought(not)to在中表示根據(jù)常規(guī)或常識(shí)推測(cè)，表示“某事應(yīng)該或不應(yīng)該

發(fā)生”，語(yǔ)氣比must或can’t / couldn’t稍弱。

3.can, could表達(dá)推測(cè)時(shí)，一般用于疑問(wèn)句和否定句中；can用于肯定句中表示一種理論

上的可能性，并不牽涉是否真的會(huì)發(fā)生，在這種用法中can只能與動(dòng)詞原形連用；could用于肯定

句中，語(yǔ)氣比

may/ might更弱。

4.must表達(dá)“情感、態(tài)度、語(yǔ)氣”主要有以下用法：

(1)表示主觀的義務(wù)和必要，主要用于肯定句和疑問(wèn)句，意思為“必須……，得……，要……”；由

must引起的疑問(wèn)句，肯定回答要用must或have to，否定回答要用needn’t或don’

t have to,意

思是“不必”。另外，must與have to都可以表示“必須”這一含義。must表示一

易錯(cuò)點(diǎn)點(diǎn)撥：

種主觀的需要，而have to表示一種客觀的需要，意思是“不得不”，其否定形式是don’ have to。

(2)must用于條件句或疑問(wèn)句中，可以用來(lái)表示責(zé)備、抱怨的感情色彩，意思為“偏要，硬要、干

嘛”。

5.在虛擬條件句中用以加強(qiáng)假設(shè)語(yǔ)氣，表示“與將來(lái)事實(shí)相反的假設(shè)”，用 If+主語(yǔ)+

should +動(dòng)詞

原形，當(dāng)“萬(wàn)一(會(huì))”講。這時(shí)可省略if，將should提到句首，變?yōu)榈寡b句式。If it

should rain

(=Should it rain)tomorrow, I would stay at home.萬(wàn)一明天下雨的話，我就待在家里。

6.should還可以用來(lái)表示說(shuō)話人對(duì)某事不能理解、趕到意外、驚異等意思，譯為“竟然，竟會(huì)”。

You can’t imagine that a well-behaved gentleman should be so rude to a lady.魚(yú)兒，在水中串上串下，吐著頑皮的泡泡；鳥(niǎo)兒從荷葉上空飛過(guò)，想親吻荷花姑娘的芳澤。四周的花兒，紫的，黃的，白的，紅的，競(jìng)相開(kāi)放。大紅花兒，張著大嘴，放聲歌唱；燈籠花兒，隨風(fēng)搖墜，四處飄香；劍蘭花兒，形態(tài)獨(dú)特，毫不遜色。它們與荷塘之景交相輝映，美不勝收 此時(shí)，我的心情興奮到極點(diǎn)，好久好久沒(méi)有看過(guò)如此美的景色了。若果我有一雙會(huì)畫(huà)畫(huà)的手，我定把這如癡如醉的荷塘活色生香的描繪一番；若果我有一部高像素的相機(jī)，我定不放過(guò)每個(gè)花開(kāi)的鏡頭；若果我是一個(gè)詩(shī)人，我定把這荷塘每片光鮮艷麗的色澤融入人生的詩(shī)篇。我更期待，期待盛夏的荷塘色，期待那更加妖嬈多姿，色澤鮮艷的荷花，期待初夏生機(jī)勃勃、揮汗如雨的激情生活！

第三篇：《情態(tài)動(dòng)詞》的用法 教案

《情態(tài)動(dòng)詞的用法》教案

一、教材分析: 這是初中的一個(gè)較重要也有難度的知識(shí)點(diǎn),作為動(dòng)詞中的一類,如何使用情態(tài)動(dòng)詞can(could),must, have to, may(might),shall（should）,will, dare, need, aught to等是本次課程的重點(diǎn)內(nèi)容.教學(xué)內(nèi)容是介紹情態(tài)動(dòng)詞的定義、特點(diǎn)、以及最重要的用法；最后加以練習(xí)進(jìn)行鞏固

二、教學(xué)目標(biāo)：

1.知識(shí)目標(biāo)：要求學(xué)生掌握使用表示猜測(cè)的情態(tài)動(dòng)詞.2.能力目標(biāo)：通過(guò)引導(dǎo)，讓學(xué)生能夠說(shuō)出學(xué)會(huì)情態(tài)動(dòng)詞的基本用法，在語(yǔ)境中的意思。3.情感目標(biāo)：讓學(xué)生在學(xué)習(xí)中情態(tài)動(dòng)詞過(guò)程中體驗(yàn)英語(yǔ)的生動(dòng)趣味性，引導(dǎo)學(xué)生提高對(duì)英語(yǔ)學(xué)習(xí)的求知欲。

三、教學(xué)重難點(diǎn)

教學(xué)重點(diǎn): 學(xué)會(huì)運(yùn)用情態(tài)動(dòng)詞can(could), must, may，might,shall，should,ought to ,will(would),dare, need, have to等的用法以及各個(gè)相近情態(tài)動(dòng)詞間的區(qū)分.教學(xué)難點(diǎn): 各個(gè)情態(tài)動(dòng)詞的用法區(qū)分.四、教學(xué)方法：

以講解為主，舉例分析。

五、教學(xué)過(guò)程

教師：同學(xué)們，我們這節(jié)課要想學(xué)習(xí)的內(nèi)容是情態(tài)動(dòng)詞的用法，那1這個(gè)情態(tài)動(dòng)詞其實(shí)我們對(duì)于我們來(lái)說(shuō)也并不陌生，平時(shí)在句子的運(yùn)用也很多，那么大家告訴我情態(tài)動(dòng)詞有哪些？ 常見(jiàn)的情態(tài)動(dòng)詞有：can(could), must, may，might, shall，should, ought to ,will(would),dare, need, have to（板書(shū)）

我們這節(jié)課主要來(lái)歸納下它的用法

1、本身具有一定詞意，但不能單獨(dú)作謂語(yǔ)。為什么說(shuō)情態(tài)動(dòng)詞不能單獨(dú)作謂語(yǔ)呢？

謂語(yǔ)是對(duì)主語(yǔ)動(dòng)作或狀態(tài)的陳述或說(shuō)明，指出“做什么”“是什么”或是“怎么樣”情態(tài)動(dòng)詞用在行為動(dòng)詞前，表示說(shuō)話人對(duì)這一動(dòng)作或狀態(tài)的看法或主觀設(shè)想。（舉例：i can wash clothes）

2、無(wú)人稱和數(shù)的變化

We must stay here.我們必須待在這兒。He must stay here.他必須待在這兒。

3、情態(tài)動(dòng)詞后面緊跟的一個(gè)動(dòng)詞用原形

She may lose her way.她可能迷路了。

4、否定形式直接在后面加no

下面我們開(kāi)始逐個(gè)學(xué)習(xí)它們的用法 [1] 首先是can/could的用法 A.表能力

can 表示現(xiàn)在的能力，could 表示過(guò)去的能力，要表示將來(lái)具備的能力通常 be able to 的將來(lái)時(shí)態(tài)。B.can和could 表允許，請(qǐng)求

表示請(qǐng)求或者允許時(shí)，兩者均可用，但用could 語(yǔ)氣更委婉更為禮貌些； Can [Could] I come in?（允許）

Can（could）you help me？（請(qǐng)求）

若是自己允許別人做某事，一般只用 can，而不用 could。如： Can [Could] I come in? 我可以進(jìn)來(lái)嗎 “Could [Can] I use your pen? ”“Yes,of course you can.”

C.can和could 表推測(cè)

對(duì)現(xiàn)在或?qū)?lái)的推測(cè)，兩者均可用，但can 通常只用于否定句或疑問(wèn)句中，一般不用于肯定句，而could則可用于肯定句、否定句和疑問(wèn)句；對(duì)過(guò)去的推測(cè)，應(yīng)在can,could之后接動(dòng)詞的完成式，且此時(shí)can仍只用于否定句或疑問(wèn)句，不用于肯定句；而could 則可用于各種句型。如：

Can [Could] this be true? 這能是真的嗎

Where can [could] he have gone? 他能到哪里去了呢

She can’t [couldn’t] have left so soon.她不可能走得這么早。She could be at home.她可能在家

[2] must / may / might的用法

這三個(gè)詞常用于推測(cè)，在推測(cè)方面的用法分為四種情況。A.對(duì)將來(lái)情況的推測(cè)，用“情態(tài)動(dòng)詞 + 動(dòng)詞原形”。(1)．She must / may / might arrive before 5.5:00前她一定/可能/也許到。

B.對(duì)現(xiàn)在進(jìn)行時(shí)的推測(cè)，用“情態(tài)動(dòng)詞 + be”，“情態(tài)動(dòng)詞 +be doing”

e.g:(1)．He must / may / might be listening to the radio now.他一定/可能/也許正在聽(tīng)收音機(jī)。

(2)．He may(might)not be at home at this time.這個(gè)時(shí)候他不可能/可能不在家。

C.對(duì)一般情況的推測(cè)，或“情態(tài)動(dòng)詞 + 動(dòng)詞原形”。

Everymornning he will sit here and read a newspaper.(每天早上他都會(huì)坐在這兒看報(bào)紙)D．對(duì)過(guò)去情況的推測(cè)，用“情態(tài)動(dòng)詞 + have +過(guò)去分詞”。

e.g:(1)．It must / may / might have rained last night.The ground is wet.地濕了，昨晚肯定/可能/也許下雨了。

[3] shall的用法 A.表征求意見(jiàn)（“好不好”）Shall we go now? B.威脅、警告、命令或根據(jù)規(guī)定有義務(wù)做 You shall leave at once!(威脅、警告)You shall clean theroom，it is your task.（義務(wù)，責(zé)任）C.表規(guī)章、法令、預(yù)言：“必須” 用于所有人稱 Every paasenger shall wait in a line.[4] should /ought to的用法 注：情態(tài)動(dòng)詞 should /ought to表推測(cè)時(shí)，意為“想必會(huì)，理應(yīng)??” A.責(zé)任，義務(wù)或要求，有時(shí)表示勸告：

You ought to /should pay more attention to what your lawyer says.B.表示推測(cè)和可能性，是“(按理說(shuō))應(yīng)該”之意 肯定的語(yǔ)氣沒(méi)有must用于推測(cè)時(shí)強(qiáng) This pen ought to /should be yours.C.should與“have +過(guò)去分詞”連用時(shí)，則又可構(gòu)成虛擬語(yǔ)氣意為 例如：should have done 本應(yīng)該做某事而沒(méi)有做 Should’nt have done 本不應(yīng)該做某事卻做了。

[5] Would和will的用法

A．表示請(qǐng)求、建議等，would比will委婉客氣。如： Would you pass me the book? B．表示意志、愿望和決心。Will表示現(xiàn)在的意愿，would表示過(guò)去的意愿，也可以表示現(xiàn)在的意愿，語(yǔ)較為委婉。如： I will never do that again.Yesterday he would’nt helped me.I would like a cup of tea.C．用“will be”和“will(would)+ have + 過(guò)去分詞”的結(jié)構(gòu)表示推測(cè)，前者表示對(duì)目前情況的推測(cè)，后者表示對(duì)已經(jīng)完成的動(dòng)作或事態(tài)的推測(cè)。如： This will be the book you want.He will have arrived by now.D．will表示習(xí)慣、請(qǐng)求，固有性質(zhì)等。

Everyday he will sit here hour after hour doing nothing.（習(xí)慣）Will you help me with my English?（請(qǐng)求）E．表料想或猜想。如：

It would be about ten when he left home.[6] dare(dared)的用法

Dare作情態(tài)動(dòng)詞時(shí)，主要用于疑問(wèn)句、否定句和條件從句中，一般不用在肯定句中。如： How dare you say I'm unfair.He daren't speak English before such a crowd,dare he? She dare not say what she thinks.她不敢說(shuō)她是怎么想的

[7] need的用法

need表示“需要”或“必須”，作情態(tài)動(dòng)詞時(shí)，僅用于否定句或疑問(wèn)句中，在肯定句中一般用must,haveto,ought to，或should代替。如： You needn’t come so early.— Need I finish the work today? —Yes,you must.注意：needn't + 不定式的完成式“表示本來(lái)不必做某事而實(shí)際上做了某事”。如： You needn't have waited for me.[8]must 和haveto的用法

A.must表示的是說(shuō)話人的主觀看法，而have to則往往強(qiáng)調(diào)客觀需要。如：

The play is not interesting.I really must go now.這部劇沒(méi)意思。我真的必須現(xiàn)在就走。B.二者的否定意義不大相同。如： You mustn't go.你可不要去。You don't have to go.你不必去。

C.詢問(wèn)對(duì)方的意愿時(shí)應(yīng)用must。如：

Must I clean all the room?我一定要打掃整個(gè)房間嗎？Yes,you must.No,you needn’t.教師總結(jié)：這節(jié)課總結(jié)了主要的情態(tài)動(dòng)詞的用法，內(nèi)容較多，給大家5分鐘時(shí)間來(lái)消化下，看完后有什么疑問(wèn)或是哪個(gè)詞的用法不是很清楚就提出來(lái)。教師：教大家一個(gè)情態(tài)動(dòng)詞的口訣口訣：動(dòng)詞原形接后面，說(shuō)話語(yǔ)氣較委婉。can “能力”may“許可”，must“責(zé)任”或“義務(wù)”。否定回答needn’t換，“需要”need, dare“敢”。should“應(yīng)該”，would“愿”，have to“被迫”表客觀。

3、課堂練習(xí)，復(fù)習(xí)鞏固

教師：我們學(xué)完了情態(tài)動(dòng)詞的用法，下面來(lái)做些練習(xí)。

2.Jane have come to the party, but she not find the exact time.A.could;could B.might;could C.should;could D.should;would

3.So many mistakes in your homework!You more careful.A.may be B.had to C.would be D.should have been

4．Her brotherbe at home now, because he was seen playing basketball in the stadium just now.A.mustn’t B.needn’t

C.can’t D.shouldn't

5．---I can’t understand why our boss is late.---He the early bus.A.could miss

B.may have missed

C.can have missed D.might miss

第四篇：英語(yǔ)情態(tài)動(dòng)詞用法歸納

情態(tài)動(dòng)詞有具體的詞義，但也同助動(dòng)詞一樣，需要與其他詞語(yǔ)一起構(gòu)成句子的謂語(yǔ)，另外情態(tài)動(dòng)詞沒(méi)有人稱和數(shù)的變化，情態(tài)動(dòng)詞后必須跟動(dòng)詞原形。那么接下來(lái)給大家分享一些關(guān)于英語(yǔ)情態(tài)動(dòng)詞用法歸納，希望對(duì)大家有所幫助。

英語(yǔ)情態(tài)動(dòng)詞用法歸納

1.can 的用法：

(1).表示能力、許可、可能性。表示能力時(shí)一般譯為“能、會(huì)”，即有種能力，尤其是生來(lái)具備的能力，此時(shí)may 和must均不可代替它。如：She can swim fast, but I can’t.她能游得很快，但我不能。I can see with my eyes.我用眼睛看。

(2).表示許可，常在口語(yǔ)中。如：You can use my dictionary.你可以用我的字典。

(3).表示推測(cè)，意為“可能”，常用于否定句和疑問(wèn)句中，此時(shí)can’t 譯為“ 不可能”。如：Can the news be true? 這個(gè)消息會(huì)是真的嗎?—Can it be our teacher?那個(gè)人有可能是我們老師嗎?—No, it can’t be our teacher.He is on a visit to the Great Wall.不可能。咱們老師正在游覽長(zhǎng)城呢。

【例題】—I think Miss Gao must be in the library.She said she would go there.—No.She __be there, I have just been there.A.can’t B.mustn’t C.needn’t D.wouldn’t

【解析】根據(jù)下文“我剛?cè)ミ^(guò)那兒”可知，應(yīng)為“ 不可能”，can’t 表示推測(cè)[答案] A

2.could的用法：

(1).can的過(guò)去式，意為“ 能、會(huì)”，表示過(guò)去的能力。如：He could write poems when he was 10.他十歲時(shí)就會(huì)寫(xiě)詩(shī)。

(2).could在疑問(wèn)句中，表示委婉的語(yǔ)氣，此時(shí) could 沒(méi)有過(guò)去式的意思。如:Could you do me a favour? 你能幫我個(gè)忙嗎?—Could I use your pen? 我能用一下你的鋼筆嗎? —Yes, you can.可以。(注意回答)

3.may的用法：

(1).表示請(qǐng)求、許可，比can 正式，如：May I borrow your bike? 我可以借你的自行車嗎?You may go home now.現(xiàn)在你可以回家了。

【例題】—_______ I borrow your MP3? —Sure.Here you are.A.May B.Should C.Must D.Would

【解析】 在此處表示請(qǐng)求，意為“ 做……可以嗎”。答案：A

(2).表示推測(cè)，談?wù)摽赡苄?，意為?可能，或許”，一般用于肯定句中。如：It may rain tomorrow.明天可能會(huì)下雨。She may be at home.她可能在家呢.(3).may的過(guò)去式為might，表示推測(cè)時(shí)。可能性低于may。如：He is away from school.He might be sick.他離開(kāi)學(xué)校了，可能是他生病了。

(4).表示希望、祈求、祝愿，?？勺g為“祝愿”。通常是用may +主+V 例如：May you have a good time.祝你過(guò)得愉快。May you be happy!祝你幸福!May you succeed!祝你成功!

4.must的用法：

(1).must 表示主觀看法，意為“必須、一定”。如：You must stay here until I come back.在我回來(lái)之前你必須呆在這兒。Must I hand in my homework right now? 我必須現(xiàn)在交作業(yè)嗎?

(2)其否定形式mustn’t表示“ 一定不要 ” “千萬(wàn)別” “禁止, 不許”.如：You mustn’t play with fire.你不許玩火。You mustn’t be late.你一定不要遲到。

(3)對(duì)must引導(dǎo)的疑問(wèn)句，肯定回答為must，否定回答為needn’t 或 don’t have to.如：—Must I finish my homework?我現(xiàn)在必須完成作業(yè)嗎?—No, you needn’t.不，你不必。

(4)must表示有把握的推測(cè)，用于肯定句。如: The light is on, so he must be at home now.燈亮著，他現(xiàn)在肯定在家。

注意其反意問(wèn)句的構(gòu)成形式：

當(dāng)must表示肯定的判斷、推測(cè)時(shí)，其反意疑問(wèn)句要用實(shí)際問(wèn)句的助動(dòng)詞來(lái)構(gòu)成。如：She must have seen the film before，hasn’t she?(注意反意疑問(wèn)句的后半部分)You must have met uncle Wang in the shop yesterday，didn’t you?(注意反意疑問(wèn)句的后半部分)

5.need的用法：

(1).need 表示需要、必須，主要用于否定句和疑問(wèn)句中，其否定形式為needn’t，意為“沒(méi)有必要，不必”。用need 提問(wèn)時(shí)，肯定回答為 must，否定回答為 needn’t或don’t have to。如：—Need I stay here any longer? 我還有必要留在這兒?jiǎn)?—Yes, you must.是的?！狽o.you needn’t /don’t have to.不，你不必。

(2).need 還可以作實(shí)義動(dòng)詞，此時(shí)有人稱、數(shù)和時(shí)態(tài)的變化，如果是人作主語(yǔ)后邊多接動(dòng)詞不定式。如：I need to do it right now.我需要馬上做這件事。He needs to learn more about the girl.他需要多了解那個(gè)女孩。

如果是物作主語(yǔ)，一般用need doing 與 need to be done這種情況下應(yīng)注意兩點(diǎn)：

①.主動(dòng)形式的動(dòng)名詞doing具有被動(dòng)的含義;②.該動(dòng)名詞可以改為其動(dòng)詞不定式的被動(dòng)形式而句子的意義不變。例如：.The door needs painting.= The door needs to be painted.那扇門需要油漆一下。Your car needs mending.= Your car needs to be repaired.你的車需要維修了。

6.dare 的用法：dare意為“敢、敢于”, 用法近似于need，有兩種詞性：

(1)dare 作為情態(tài)動(dòng)詞，多用于否定句、疑問(wèn)句或條件句中，無(wú)第三人稱單數(shù)形式，只有一般現(xiàn)在時(shí)和一般過(guò)去時(shí)。如：Dare he tell them what he knows? 他敢告訴他們所知道的情況嗎?I daren’t ask her – will you do it for me? 我可不敢問(wèn)她，你能幫我問(wèn)問(wèn)嗎?

(2)dare 作為實(shí)義動(dòng)詞，此時(shí)有人稱、數(shù)及時(shí)態(tài)的變化。如：He doesn’t dare to break his promise.他不敢食言。

注意：在口語(yǔ)中，dare 的各種形式常與不帶to 的不定式連用。如：Do you dare tell her what I said?

你敢告訴她我說(shuō)的話嗎?I didn’t dare look at him.我不敢看他。

英語(yǔ)情態(tài)動(dòng)詞講解：

一、九大情態(tài)動(dòng)詞的時(shí)態(tài)關(guān)系：

1.現(xiàn)在式 can--過(guò)去式 could

2.現(xiàn)在式 may--過(guò)去式 might

3.現(xiàn)在式 shall--過(guò)去式 should

4.現(xiàn)在式 will--過(guò)去式 would

5.現(xiàn)在式 must--過(guò)去式 must(常用had to來(lái)代替)

二、情態(tài)動(dòng)詞表示“可能”或“預(yù)測(cè)”

(can, could, will, would, shall, should, must, ought to)

(1)can 和 could 用于表示“可能”或“預(yù)測(cè)”：

1.He can't be at home.他不可能在家。(否定句)

2.Can the news be true? 這消息可能是真的嗎?(將情態(tài)動(dòng)詞 can 置于主語(yǔ) the news 前就成疑問(wèn)句)

3.Anybody can make mistake.任何人都可能犯錯(cuò)誤。(只表示理論上的可能性)

(2)may 和 might 用于表示“事實(shí)上的可能性”或“預(yù)測(cè)”：

1.It may rain tomorrow.(表示可能會(huì)發(fā)生)明天可能會(huì)下雨。

2.It may snow later this afternoon.(表示預(yù)測(cè))今天下午可能會(huì)下雪。

3.You might be right.(表示有可能)你可能是對(duì)的。

(3)will 和 would 用于表示“預(yù)測(cè)”或“習(xí)慣性”：

1.I think he will be all right now.我想他現(xiàn)在一定好了。(will be 表示一定會(huì))

2.That would be his mother.那肯定是他母親。(would be 表示肯定是)

3.He will sit there hour after hour looking at the river.他經(jīng)常一連幾個(gè)小時(shí)坐在那兒看著河水。(will 表示經(jīng)常的)

(4)shall 和 should 用于表示“必定”：

1.I shall be rich one day.(shall be)總有一天我會(huì)發(fā)達(dá)的。

2.That should be Sam and his mother.(should be)那準(zhǔn)是Sam和他的母親。

(5)must 用于表示“必定”，“必會(huì)”：

1.This must be good for you.(must be 肯定)這肯定對(duì)你是有益的。

2.All mankind must die.(表示必然會(huì)發(fā)生的事)所有的人一定會(huì)死的。

3.Mustn't there be a mistake?(mustn't 多用于疑問(wèn)句)那肯定會(huì)有錯(cuò)誤嗎?

三、情態(tài)動(dòng)詞表示“許可”、“請(qǐng)求”

(can, could, will, would, shall, should, may, might, must)

(1)can 和 could 用于表示“許可”、“請(qǐng)求”：

1.Can I go with you?(請(qǐng)求)我能跟你一起走嗎?

2.Father said I could go to cinema.(表示過(guò)去的許可)爸爸說(shuō)我可以去看電影。

3.Could I ask you something?(請(qǐng)求,用 could 比 can 更婉轉(zhuǎn))我可以問(wèn)你一件事嗎?

(2)will 和 would 用于表示“請(qǐng)求”

1.Will you kindly tell me the way to the post office? 請(qǐng)問(wèn)到郵局怎么走?(表示客氣請(qǐng)求)

2.Would you give me your address? 請(qǐng)你告訴我你的地址，好嗎?(用would比will表示更客氣)

(3)shall 和 should 用于第一人稱，表示征求對(duì)方的意見(jiàn)

1.Shall we talk? 我們談?wù)労脝?

2.What should we do next?(用should 比 shall 表示更客氣)下一步我們?cè)撛趺醋?

3.Shall he come to see you?(用于第三人稱疑問(wèn)句)要不要他來(lái)看你?

(4)may 和 might 用于表示“許可”(口語(yǔ)中多用can)

1.You may take a walk.(表示給予許可)你可以散散步。

2.You might read the story for me.(比may更婉轉(zhuǎn))是否請(qǐng)給我讀一讀這故事。

3.May I make a suggestion? 我可以提個(gè)建議嗎?

4.Might I take a look of your work? 我看看您的大作行嗎?

5.Students may not make noise in the library.(may not 表示不許可或禁止)

學(xué)生不得在圖書(shū)館里吵鬧。

6.If I may say so, you are not right.(用于條件句，表示請(qǐng)求)

你是不對(duì)的，如果我可以這么說(shuō)的話。

(5)must 用于表示“禁止”，“不準(zhǔn)”：

1.Cars must not be parked here.(must not表示不許可)此地不準(zhǔn)停車。

2.All of you mustn't fishing in the pool.(must not 語(yǔ)氣方面比 may not 更強(qiáng))

你們不準(zhǔn)在池里釣魚(yú)。

情態(tài)動(dòng)詞用法歸納：

一、can, could

1)表示能力(體力、知識(shí)、技能)。

Can you lift this heavy box?(體力)

Mary can speak three languages.(知識(shí))

Can you skate?(技能)

此時(shí)可用be able to代替。Can只有一般現(xiàn)在時(shí)和一般過(guò)去式;而be able to則有更多的時(shí)態(tài)。

I’ll not be able to come this afternoon.當(dāng)表示“經(jīng)過(guò)努力才得以做成功某事”時(shí)應(yīng)用be able to，不能用Can。如：

He was able to go to the party yesterday evening in spite of the heavy rain.2)表示請(qǐng)求和允許。

-----Can I go now?

-----Yes, you can./ No, you can’t.此時(shí)可與may互換。在疑問(wèn)句中還可用could,might代替，不是過(guò)去式，只是語(yǔ)氣更委婉，不能用于肯定句和答語(yǔ)中。

----Could I come to see you tomorrow?

----Yes, you can.(No, I’m afraid not.)

3)表示客觀可能性(客觀原因形成的能力)。

They’ve changed the timetable, so we can go by bus instead.This hall can hold 500 people at least.4)表示推測(cè)(驚訝、懷疑、不相信的態(tài)度)，用于疑問(wèn)句、否定句和感嘆句中。

Can this be true?

This can’t be done by him.How can this be true?

二、may, might

1)表示請(qǐng)求和允許。might比 may語(yǔ)氣更委婉，而不是過(guò)去式。否定回答時(shí)可用can’t

或mustn’t，表示“不可以，禁止”。

----Might/ May I smoke in this room?

----No, you mustn’t.----May/Might I take this book out of the room?

----Yes, you can.(No, you can’t / mustn’t.)

用May I...?征徇對(duì)方許可時(shí)比較正式和客氣，而用Can I...?在口語(yǔ)中更常見(jiàn)。

2)用于祈使句，表示祝愿。

May you succeed!

3)表示推測(cè)、可能性(不用于疑問(wèn)句)。

might不是過(guò)去式，它所表示的可能性比may小。

1.He may /might be very busy now.2.Your mother may /might not know the truth.三、must, have to

1)表示必須、必要。

You must come in time.在回答引出的問(wèn)句時(shí)，如果是否定的，不能用mustn’t(禁止，不準(zhǔn))，而用needn’t, don’t have to(不必).----Must we hand in our exercise books today?

----Yes, you must.----No, you don’t have to / you needn’t.2)must是說(shuō)話人的主觀看法，而have to則強(qiáng)調(diào)客觀需要。Must只有一般現(xiàn)在時(shí)，have to 有更多的時(shí)態(tài)形式。

1.he play isn’t interesting, I really must go now.2.I had to work when I was your age.3)表示推測(cè)、可能性(只用于肯定的陳述句)

1.You’re Tom’s good friend, so you must know what he likes best.2.Your mother must be waiting for you now.四、dare, need

1)dare作情態(tài)動(dòng)詞用時(shí), 常用于疑問(wèn)句、否定句和條件從句中, 過(guò)去式形式為dared。

1.How dare you say I’m unfair?

2.He daren’t speak English before such a crowd, dare he?

3.If we dared not go there that day，we couldn’t get the beautiful flowers.2)need 作情態(tài)動(dòng)詞用時(shí), 常用于疑問(wèn)句、否定句。在肯定句中一般用must, have to, ought to, should代替。

1.You needn’t come so early.2.----Need I finish the work today?

----Yes, you must./ No, you needn’t.3)dare和 need作實(shí)義動(dòng)詞用時(shí)，有人稱、時(shí)態(tài)和數(shù)的變化。在肯定句中，dare后面常接帶to的不定式。在疑問(wèn)句和否定句中，dare后面可接帶to或不帶to的不定式。而need后面只能接帶to的不定式。

1.I dare to swim across this river.2.He doesn’t dare(to)answer.3.He needs to finish his homework today.

第五篇：情態(tài)動(dòng)詞小結(jié)

情態(tài)動(dòng)詞小結(jié)

情態(tài)動(dòng)詞有：can（could），may（might），must，have to, shall（should），will（would），need, dare, ought to等。一． 情態(tài)動(dòng)詞can, may, must用法 ㈠基本用法 1.can ⑴ 會(huì)，能夠--Can you swim?--Yes, I can.--No, I can?t.⑵ 口語(yǔ)中代替may.You can(may)park here.你可以把車停在這里。(許可)2.may允許，許可--May I come in?--Yes, you may./Sure, come on in.--No, you mustn?t./No, you can?t.No, you?d better not.3.must必須--Must we finish the exercise today?--Yes, you must.--No, you needn?t./No, you don?t have to.4.need 需要，必需--Need you go now?=--Must you go now?--Yes, I must.--Yes, I must.--No, I needn?t.--No, I needn?t.(need作為情態(tài)動(dòng)詞，通常用在否定句和疑問(wèn)句中。)注意一：can 與be able to 都可以表示“能力”，區(qū)別是： ⑴ can只有現(xiàn)在和過(guò)去兩種形式

I can play the piano.She couldn?t play the piano when she was a little girl.⑵ be able to ① 有更多的形式和時(shí)態(tài)

We shall/will be able to finish the work next week.I haven?t been able to find the book.② 指具體一次活動(dòng)

I can swim but I am not able to cross the rough sea.有時(shí)兩者可以互換: I?m not able to(can?t)answer your question.Are you able to(Can you)type(打字)？

注意二：could的用法

⑴ 作為can的過(guò)去式，表示過(guò)去的能力。

When I was young I could climb any tree in the forest.這時(shí)也可用was(were)able to ⑵ 用來(lái)代替can，婉轉(zhuǎn)地提出請(qǐng)求，想法，建議等?；卮疬@種情況下could引導(dǎo)的一般疑問(wèn)句時(shí)，不用could，而要用can。A: Could you tell me how to get to the hospital? B: Of cause, I can.注意三：must的否定形式表示“不得”，“一定不要”，“禁止” ① You mustn?t take photos in here.It?s forbidden(禁止).② You mustn?t drive without a license（駕照）.③ We mustn?t be late, must we？

（與第4頁(yè)對(duì)比，此must不表猜測(cè),兩回事。）注意四：must的過(guò)去式是must，常用 had to 代替。I had to see the dentist.注意五：must 和 have to 都可以表示必須，但must表示說(shuō)話人的主觀看法，have to表示客觀需要。You must say sorry to me for that.You have to drive quickly, we have little time.注意六：May+動(dòng)詞原形表“祝愿”。

May you succeed.May you be happy every day.㈡ 可能性用法

1.can表示“可能性”① 疑問(wèn)句：只能用can

Who can it be ?

② 否定句：cannot(can?t)“不可能 It cannot be Jenny.2.may表示“可能性”① 否定句：may not“可能不”

It may not be Jenny.② 肯定句：“大概”，“也許”，“可能” It may be Jenny.3.must表示“可能性”，只能用于肯定句，表推測(cè)：“一定是”，“準(zhǔn)是”，“必是”，“必定”。

It must be Jenny.小結(jié)表示“可能性”：

疑問(wèn)句：只能用can 否定句：cannot(can?t)“不可能”(反義詞是must“準(zhǔn)是”)may not“可能不”

肯定句：may “大概”

must“準(zhǔn)是”(反義詞是can?t)注意一: 在表示“可能性”時(shí)，凡是對(duì)過(guò)去事物的猜測(cè)，不管是疑問(wèn)．．句，否定句還是肯定句，都要用完成時(shí)。．．．① It must have rained last night.You see, the ground is still wet.② He can?t have been to your home.He doesn?t know your address注意二：may+原型 表示 現(xiàn)在或?qū)?lái)的可能性。若表示對(duì)過(guò)去事物 ．．．． 的猜測(cè)，則用完成時(shí)。③ He may come today.(tomorrow)He might come today.(tomorrow)(might語(yǔ)氣更不肯定，不是may的過(guò)去時(shí))④ She might have called for help.她可能大聲喊“救命”了。請(qǐng)翻譯下里句子：

1.Where can Wei Fang be? 2．That can?t be Mary.She is in hospital.3.Surely you can?t be hungry.You?ve only just had lunch.4.The key can?t be in the room.I have just searched it carefully.5.You may/ can go and ask him.But he may not answer you.6．A：Look！Someone is coming.Who can it be? B: It may be our headmaster.A: It can?t be him.He has gone to Shanghai.B: It must be Mr.Zhang.He looks like our headmaster.7.Anna may know Tom?s address.8.They may be waiting at the station.9.I may be going to Europe next year.10．He may have gone abroad.11.I?m afraid I must be going now.12.You must be hungry.Have something to eat.13.They must be twins.14.There?s a lot noise from next door.They must be having party a party.15.I can?t find him anywhere.He must have left.16.I can?t find my book.I must have left it at home.17.You must have been thinking of something.18.A: We went to Hainan for the winter vacation.B: That must have been nice.注意三：must表示猜測(cè)時(shí)的反義疑問(wèn)句

⑴ “must be +表語(yǔ)”的結(jié)構(gòu)，must表示肯定猜測(cè)時(shí)，含有“準(zhǔn)是”，“勢(shì)必”，“一定”等意義時(shí)，反義疑問(wèn)句用“isn?t/aren?t+主語(yǔ)” They must be hungry after the long walk, aren?t they? ⑵ “must have done” 表示猜測(cè)時(shí)，反義疑問(wèn)句用“haven?t/hasn?t +主語(yǔ)”或“didn?t+主語(yǔ)”

① They must have studied English before, haven?t they? ② She must have met a fairy(仙女), hasn?t she? ③ You must have seen the film last week, didn?t you? ．．．．．．．．解題秘笈：① 把must去掉 ② 找時(shí)間狀語(yǔ) ③ 重新組成一新句子 ④ 按新句子的時(shí)態(tài)造反義疑問(wèn)句

① You must have been to Beijing, ＿＿＿ ＿＿？

去掉must；無(wú)時(shí)狀；重組成You have been to Beijing； 故答案為：haven?t you ② You must have finished your homework yesterday, ．．．．．．．．．＿＿＿ ＿＿？去掉must；時(shí)狀為yesterday;重組成 You finished your homework yesterday;故答案為：didn?t you 二．情態(tài)動(dòng)詞need的用法

⑴ need 表示“需要”，“必需”。作為情態(tài)動(dòng)詞，通常用在否定句和疑問(wèn)句中。

① He needn?t pay for it.(情態(tài)動(dòng)詞)=He doesn?t need to pay for it.(行為動(dòng)詞)②--Need you go now?=--Must you go now?--Yes, I must.--Yes, I must.--No, I needn?t.--No, I needn?t.⑵ need也可用作行為動(dòng)詞，其變化與一般動(dòng)詞相同。① We need to think it over.(肯定句)② Does he need to know it?=Need he know it? ③ She didn?t need to go.=She needn?t go.⑶ 按句型背：

need doing=need to be done ① The door needs painting.=The door needs to be painted.② The old man needed looking after.= The old man needed to be looked after.三．情態(tài)動(dòng)詞dare的用法

⑴ dare 表示“敢” 作為情態(tài)動(dòng)詞，通常用于否定句，疑問(wèn)句或條件句中。dare 作為情態(tài)動(dòng)詞只有兩種形式:dare, dared(當(dāng)主語(yǔ)是第三人稱單數(shù)時(shí)，dare 不加s)① She dare not do so.(否定句)② Dare he do it?(一般疑問(wèn)句)③ How dare you say I?m unfair.(特殊疑問(wèn)句)④ Jump if you dare.有膽量你就跳。（條件句）⑵ 除了在“I dare say…” 這種習(xí)慣用語(yǔ)中，dare 在肯定句中作 情態(tài)動(dòng)詞的情況是很少的。（特殊用法，口語(yǔ)中常用，按句型背）① I dare say you are wrong.② A: If you die, who will get your money？

B: I dare say my uncle will.I have no other relatives.(親戚)⑶ dare 也可用作行為動(dòng)詞，其變化與一般動(dòng)詞相同。① Who dare to go? ② I don?t dare(to)ask her.問(wèn)：此句中的to 為什么可以省略？

答: 當(dāng)dare 作為①行為動(dòng)詞②在否定句中(兩個(gè)條件必須同時(shí)具備)，其后面的不定式可以省略to。又如： ③ We didn?t dare(to)try a shot.四．情態(tài)動(dòng)詞shall和should的用法

⑴ shall 作為情態(tài)動(dòng)詞，用于二，三人稱，表示說(shuō)話人的意愿，有．．．．．．．．“命令”，“警告”，“威脅”，“強(qiáng)制”，“允諾”等意思。（一人稱用 shall是將來(lái)時(shí)）

① You shall do as I say.(命令)② Tell him that he shall have the book tomorrow.（允諾）③ You shall have whatever you want.(諾言)(我答應(yīng))你要什么我給你什么。

④ He shall be sorry for it one day.(警告)有一天他會(huì)后悔的，我告訴你。

⑵ 在疑問(wèn)句中，shall 用來(lái)征詢對(duì)方意見(jiàn)或請(qǐng)求指示，用于一，三．．．．．．．．．．．人稱。譯成“（你說(shuō)）…好嗎？”

① Where shall I wait for you?(你說(shuō))…

② 區(qū)別： Shall he come at once?(你說(shuō))他要不要立刻來(lái)?

（征求你的意見(jiàn)，情態(tài)動(dòng)詞）

Will he come at once？他將立刻來(lái)嗎？（純將來(lái)時(shí)）③ Shall we start the meeting now？

④ Let?s have a rest, shall we?(Let?s 包括對(duì)方)對(duì)比：Let us have a rest, will you?(Let us 不包括對(duì)方)對(duì)于上述這類問(wèn)句的回答，沒(méi)有嚴(yán)格不變的肯定或否定模式。⑤ Shall I open the window? Yes, please.⑥ Shall I get you some more tea? Yes, please.⑦ Shall we have a meeting tomorrow? Yes ,I agree./(Well, I don?t think we need to.)⑧ Shall we go there by bike? All right.(OK./Yes, I think so.)⑨ Shall we go to the park? Good idea!⑶ should 作為情態(tài)動(dòng)詞，譯成“應(yīng)該”

① You should keep your promise.② We should be strict in all our work.五．情態(tài)動(dòng)詞 will和would的用法 ⑴ will 表示“意志”,“意愿”,可用于各種人稱。．．．． ① I will(樂(lè)意，愿意)tell you all about it.② We will help him if he asks us(to).③ He won?t go.⑵ 在疑問(wèn)句中，will用來(lái)征詢對(duì)方意見(jiàn)或請(qǐng)求指示，用于二人稱。．．．．．．．．．．．譯成“（你說(shuō)）…好嗎？”

①---I?m going down to the shop after school.Will you go with me?---Yes,I will.(I?m sorry, I can?t)② Will you please open the window? =Please open the window, will you? ③ Don?t forget to give her some food and change her water, will you?(祈使句,用will you)④ Be sure to write to us, will you?(祈使句)⑤ Let us have a look at your photos, will you？ ⑥ –Alice, you feed the bird today,＿＿＿？-But I fed it yesterday.A.do you B.will you C.didn?t you D.don?t you ⑶ 表示習(xí)慣性動(dòng)作，有“總是”，“慣于”的意思。還表示“自然傾向”。

① He?ll talk for hours if you give him the chance.② Fish will die out of water.would ⑴ would是will的過(guò)去式，表示過(guò)去時(shí)間的“意志”，“愿望”用于各種人稱。

①“We will help you.” said they.They said that they would help us.② No one would say that he couldn?t see the Emperor?s new clothes.③ I promised that I would do my best.(按句型記)made a promise ⑵ 表示說(shuō)話人的意愿或向?qū)Ψ教岢稣?qǐng)求，語(yǔ)氣比will婉轉(zhuǎn)。指的是現(xiàn)在時(shí)間。

① I?d like to see your ten-speed bicycles.② Would you like some bananas?(Bananas!I love them./ Yes, please./ No, thanks.)③--Would you like to see a film?--Yes, I?d like to./I?m glad to./I want to./ I?d love to.…

/Thanks.I?m afraid I won?t be able to./Thanks.That would be nice.④--Would you like to come to supper?--Oh, thank you!I would love to.注意：I?d like to=I?d love to=I would like to=I should like to =I would like to=I should love to.①--④按句型記

⑤ Would you tell me the way to the station?(比will 婉轉(zhuǎn))⑶ 表示過(guò)去的習(xí)慣動(dòng)作,“總是，慣于，過(guò)去常?！北萿sed to 正式。且沒(méi)有“現(xiàn)在已無(wú)此習(xí)慣”的含義。

① In winter, snow fell and the roofs of my old house would become thick, and all the trees would become white.② She would sit like that for hours.③ Every day she would get up at six o?clock.⑷ 表猜測(cè)

① It would be ten o?clock when she left home.② I?d say she ?s about 40.六．情態(tài)動(dòng)詞ought to的用法

ought to=should“應(yīng)該”，“應(yīng)當(dāng)” 否定形式oughtn?t to= shouldn?t ① You ought to visit your parents more often.= You should visit your parents more often.② You oughtn?t to make private phone calls in work time.= You shouldn?t make private phone calls in work time.七．情態(tài)動(dòng)詞had better的用法

had better表示“最好…”（had 常縮寫(xiě)為?d）否定形式為had better not ① You?d better take a nap after lunch.② We?d better wait for him.③ You?d better call a doctor.④ They?d better go home.⑤ You?d better not talk like that.13