Period 4 Grammar

Modal Verbs

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What should/shouldn’t we do to keep healthy?

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What kind of food must we eat to be strong?

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What ought we to do to stay slim?

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His mother cooked a lot

of food for him. She has

been cooking all the morning.

She must be tired now.

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I have just eaten a lot of food for lunch.

You can’t be hungry now.

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Excuse me, _____ you tell me the way to the railway station, please?

could

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You are carrying a lot of things. You can’t open the door yourself. There’s a man standing near the door. You say to him:

________you open the door, please?Could

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______ you like a cup of coffee?Would

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Her house is near the railway.

It ____ be noisy there. must

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The old restaurant

____ be very good.

It’s always full of

people. The new restaurant

____ be very good.

It’s always empty.

must

can’t

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Don’t tell anybody what I said. You ______ keep it a secret.

must

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She called me yesterday evening

but I didn’t hear it. I ______________ (be) asleep. must have

been ks5u 精品课件

Where is Bob?

Perhaps he is in his office. =He ____ be in his office.

may ks5u 精品课件

Where is Jane?

Perhaps she is reading newspapers. =She _______________ (read) newspaper.

may be reading

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Perhaps she was ill yesterday.

=She _____ be ill yesterday.

might

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In China many children ________ wear uniform when they go to school.

have to

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Last night Paul became ill suddenly.

We ______ call the doctor.had to

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The floor is clean. You ________ sweep it.

needn’t

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You ___________ believe everything you read on the Internet.

shouldn’t

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I. (Revision) What modal verbs have you learned?

• can/could may/ might •will/ would had better • shall/ should must • have to need • ought to dareks5u 精品课件

I. Try to explain the meanings of the modal verbs in the following sentences.

1.He can speak English well.2.You can go home now.3.That can’t be true.4.Could you please show me the way to

Beihai Park?5.They hunters are lost. They could starve.6. May I come in?7. He may give you some help.

abilitypermission

guessing

request

possibilitypermission

possibilityks5u 精品课件

8.Don’t worry. I will help you.9.Often he would dress up like a rich

man.10.Would you like to join us for dinner?11.You shall have the ticket as soon as I

get it.12.You should arrive at the airport two

hours before he goes.13.It is five o’clock. He should turn up

soon.14.Wang Feng wins an award every

year. He must be strong.

promise

past habit

request

promise

prediction

advice

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这个电脑肯定出了问题。There must be something wrong with the computer.

你努力学了一整天， 一定累了吧You have worked hard all day. You must be tired.

她们明天可能会到这里来。They may come here tomorrow.

这个人不可能是玛丽， 她生病了。

It can’t be Mary. She has fallen ill.

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1.I thought you 　　 like something to read, so I have brought you some books.A may B. might C. can D. must 2.You 　　 to the meeting this afternoon if you have something important to do.A. needn‘t to come B. don’t need come C. don't need comingD. needn't come 3.He 　　 you more help, even though he was very busy. A. might have given B. might give C. can have given D.may give 4.- 　　 I help you with some shoes,madam?-Yes, I would like to try on those brown ones.A. Will B. Should C. May D. Must

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5.__it be true that Albert passed the test in geography? 　

A.May 　 B.should C.Could 　 D.would 6.You lead a horse to the water but you

not make it drink. A.will,can B.may; can C.may; dare D.dare; can 7.─Must we finish the composition in

class? ─No, you . 　 　　　　　　　　　 A.needn't B.mustn't C.won't D. shouldn't 8.Her eyes were red.She 　　 . 　 　　　　　

　　　　　　　　　　 　 A. must cry 　 B. must be criedC. must have been crying D. may cry

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9.The only thing that really matters to the children is how soon they _return to their school. A.can B.must C.have to D.ought to 10.I want to go to the chemist's, but you 　　　　　 ___go with me.A.need not B.must not C.need D.must

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11.-My goodness! I've just missed the train. -That's too bad. I am sure you___ it, if you had hurried.

A.could have caught B. had caughtC. would catch 　　　 D.could catch 12.Look! What you've done! You 　　

more careful. A.may be B. had to C. should have been D. would be

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13.__I repeat the question? 　 A.Shall B.Will C.Do you want that D. Do14.Professor Li,many students want to see

you. 　　 ______they wait here or outside! A.Do 　 B.Will 　 C.Shall D.Are15.You read that book if you don‘t want

to. A.haven't B.can't C.mustn't D.needn't

16.Johnny,you 　　 play with the knife;you _____ 　　　　 hurt yourself.

A.won‘t; can’t B.can‘t;shouldn’tC.shouldn't; must D.mustn't;may ks5u 精品课件

17.It‘s nearly seven o’clock.Jack be here at any moment.A.must 　 B.need 　 C.can D.should 18.─There were already 5 people in the car,but they managed to take me as well. ─It a comfortable journey. 　A.can‘t be 　　 B.shouldn't beC.couldn't have been D.mustn't have been 19.Tom ought not to _me your secret, but he meant no harm.A.have told B.tell C.be telling D.having told 20.Everyone is here. we start the meeting?A.Can 　 B.Must 　 C.Should 　 D.Shall

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21.I parked my car right here but now it‘s gone.It 　　 .A.must be stolen 　 B.may be stolenC.must have stolen D.must have been stolen 22.He the work yesterday,but he didn‘t.　　A.must have finished B.need have finished C.finished 　 D.should have finished 23.He did not pass the examination. As a good student,he 　　 . A.mustn't have failed B.may not have failed C.needn't have failed D.shouldn't have failed

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1. 作为情态动词用，常用在否定句和疑问句中。Dare (need) +S +VS + daren’t (needn’t) +V

I daren’t walk through the forest at night.Dare you walk through the forest at night?You needn’t return the book now.Need he go yesterday?

可兼做行为动词的情态动词： need 、 dare

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2. 作实义动词用，常用在肯定句中 , 有人称、时态、和数的变化He needs to go there himself.He has grown up,we don’t need to worry about him.

3.Sth (sb) need( want, request)+ doing/ to be done The house needs cleaning/ to be cleaned The boy needs sending to the hospital at once.

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Our color TV set is still good enough. You needn’t have bought a new one.

4.needn’t have done 表示原本不必要做的事情却已经做了的情况 , 意为“本不必要…”

Your home is not far from your school ,so you needn’t have leftin such a hurry then.

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5. 注意对 need 问句的回答 :

--Need I finish the work today?

--Yes, ________________.

No, ________________.

No, ________________.

you must

you needn’t

you don’t have to

--Must we do it now? --No, you __________. needn’t

(don’t have to)

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1. 判断正误 :

How dare you say such a thing?

How dare you to say such a thing?

He daren’t to speak English before such a crowd, did he?

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

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These dishes need be cleaned carefully.

These dishes need to be cleaned carefully.

These dishes need cleaning carefully.

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情态动词的其他用法

may well + v = have good reason to ( 理所当然） You may well say so.may/ might as well = had better do.( 最好。。） You may as well say so.may as well +v….+as+v ( 与其… . 不如… .) ( 最好 … . 而不要 … . ）You might as well throw your money away as lend it to him.

1. may

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1.Judging from his accent, he must be from the south,

2.It is eleven o’clock at night and the lights are off. They must be sleeping now,

isn’the

aren’t they?

因 must 后是系动词 be

must 后接的是 be sleeping ，是对正在进行的情况推测

2. 与 must 有关句子的反意疑问句

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1.We must have learned 2,000 words by the end of last term, hadn’t we?

3.He must have gone to Beijing,

didn’t it?

hasn’t he?

若句中含有过去完成时的时间状语，用过去完成时完成反意疑问句

若句中含有过去的时间状语，用一般过去时完成反意疑问句

若句中不含任何时间状语， 用现在完成时完成反意疑问句

2.It must have rained last night, for the road was very muddy ，

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Homework:

The grammar part in “ Chang Gui Xun Lian ”

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