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情态动词专项练习

情态动词有具体的词义，但也同助动词一样，需要与其他词语一起构成句子的谓语，另外情态动词没有人称和数的变化，情态动词后必须跟动词原形。

考点一：can，may，must等情态动词在陈述句中的用法：

1. can的用法：

（1）.表示能力、许可、可能性。表示能力时一般译为“能、会”，即有种能力，尤其是生来具备的能力，此时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）.表示许可，常在口语中。如：You can use my dictionary. 你可以用我的字典。

（3）.表示推测，意为“可能”，常用于否定句和疑问句中，此时can’t译为“不可能”。如：Can the news be true?这个消息会是真的吗？—Can it be our teacher?那个人有可能是我们老师吗？—No, it can’t be our teacher. He is on a visit to the Great Wall.不可能。咱们老师正在游览长城呢。

【例题】—I think Miss Gao must be in the library. She said she would go there.—No. She __be there, I have just been there.

【解析】根据下文“我刚去过那儿”可知，应为“不可能”，can’t表示推测[答案]

2. could的用法：

（1）.can的过去式，意为“能、会”，表示过去的能力。如：He could write poems when he was 10. 他十岁时就会写诗。

（2）. could在疑问句中，表示委婉的语气，此时could没有过去式的意思。如:Could you do me 你能帮我个忙吗？—Could I use your pen?我能用一下你的钢笔吗?—Yes, you can.可以。（注意回答）

3. may的用法：

（1）.表示请求、许可，比can正式，如：May I borrow your bike?我可以借你的自行车吗？You may go home now.现在你可以回家了。

【例题】—_______ I borrow your MP3?—Sure . Here you are. A. May B.Should C.Must D. Would 【解析】在此处表示请求，意为“做……可以吗”。答案：A

(2) .表示推测，谈论可能性，意为“可能，或许”，一般用于肯定句中。如：It may rain tomorrow .明天可能会下雨。She may be at home.她可能在家呢.

be sick.

他离开学校了，可能是他生病了。

(4) . 表示希望、祈求、祝愿，常可译为“祝愿”。通常是用may +主+V例如：May you have

a good time.祝你过得愉快。May you be happy!祝你幸福！May you succeed！祝你成功！

4. must的用法：

(1).must表示主观看法，意为“必须、一定”。如：You must stay here until I come back.在我回来之前你必须呆在这儿。Must I hand in my homework right now?我必须现在交作业吗？

（2）对must引导的疑问句，肯定回答为must，否定回答或don’t have to .如：—Must I finish my homework?我现在必须完成作业吗

(4)must表示有把握的推测，用于肯定句。如: The light is on, so he must be at home now.灯亮着，他现在肯定在家。

注意其反意问句的构成形式：

当must表示肯定的判断、推测时，其反意疑问句要用实际问句的助动词来构成。如：She must have seen the film before, hasn’t she?(注意反意疑问句的后半部分)You must have met uncle Wang in the shop yesterday，didn’t you? (注意反意疑问句的后半部分)

5. need的用法：

（1）.need表示需要、必须，主要用于否定句和疑问句中，，意为“没有必要，不必”。用need 提问时，肯定回答don’t have to。如：—Need I stay here any longer? 我还有必要留在这儿吗？—Yes, you must .是的。—No. you needn’t /don’t have to.不，你不必。

(2).need还可以作实义动词，此时有人称、数和时态的变化，如果是人作主语后边多接动词不定式。如：I need to do it right now.我需要马上做这件事。He needs to learn more about the girl.他需要多了解那个女孩。

如果是物作主语，一般用need doing与need to be done这种情况下应注意两点：

①.主动形式的动名词doing具有被动的含义；②.该动名词可以改为其动词不定式的被动形式而句子的意义不变。例如：. The door needs painting. = The door needs to be painted.那扇门需要油漆一下。Your car needs mending. = Your car needs to be repaired.你的车需要维修了。

7. shall的用法：

shall表示征求对方意见（多用于第一、三人称），如：Shall we go out for a walk?我们出去散步好吗？

在英语中，我们可以用其他多种方式提出我们的建议或征求对方意见。

(2).用“What/How about...?”来提出建议；about后接名词或动词ing形式。如：What about/How about a drink? What about/How about taking Tom with us?

(3).用“Why not...?”来提出建议，表示“何不……”not面后接动词原形。“Why not...?”实际上是“Why don't you/we...?”的简略形式。如：Why not meet at the school gate at eight? Why don't we stay here another day?

(4).用“Would you like...?”来提出建议，意思是“你想要……吗?”Would you like后可接名词或不定式。如：Would you like a cup of tea?Would you like to go and see her?

因此，如果我们说：“去游泳好吗?”英语中可有这样几种表达法：Shall we go for a swim? Let's go for a swim，shall we?What about/How about going swimming?Why not go for a swim? Would you like to go for a swim?What do you think of going for a swim?

8. should的用法：

（1）.should意为“应该”，可表示劝告、建议、义务、责任等。如：We should protect the environment.我们应该保护环境。

（2）Should have done表示对过去动作的责备、批评。如：You should have finished your homework.

你应该已经完成作业了。（事实上你没有完成。）

9. will的用法：

will表示意愿、意志、打算，可用于多种人称。如：I will help you if I’m free this afternoon.今天下午如果我有空，我就会帮你。

注意：

1、will在there be句型中的形式及其句式变换。

由于“一般将来时”的结构可以用“will+动词原形”来表示，所以there be句型的一般将来时的形式就是there will be。（一定不能说there will have）例如：There are many students in our school.→There will be many students in our school. There will be a sports meeting next week.一定不能说：There will have a sports meeting next week.

2、will与be going to do something区别：

①. be going to表示近期、眼下就要发生的事情，will表示的将来时间则较远一些，如：He is going to write a letter tonight. He will write a book one day.

②. be going to表示根据主观判断将来肯定发生的事情，will表示客观上将来势必发生的事情。He is seriously ill. He is going to die. He will be twenty years old.

us her book.

He will be here in half an hour.

④.在有条件从句的主句中，一般不用be going to,而多用will,如：If any beasts comes at you, I'll stay with you and help you.

10. had better的用法：

had better意为“最好”，没有人称的变化，后面接不带to的不定式，其否定形式为：had better not。如：

We had better go now.我们最好现在就走。You had better not give the book to him.你最好不要把这本书给他。

考点二：含有情态动词的疑问句的回答:

1.对may引出的问句，可以有下列回答方式：Yes,you may. Yes, of course.Yes, certainly.Sure . No, you can’t.

2.对must引出的疑问句，回答方式为：Yes, …must. No,…don’t have to.

3.could在疑问句中，表示委婉的语气，此时could没有过去式的意思。如:Could you do me a 你能帮我个忙吗？—Could I use your pen?我能用一下你的钢笔吗?—Yes, you can.可以。（注意回答）

4. shall引出的疑问句用于第一人称，表示征求对方意见或客气的请求。其回答方式有以下几种：

Yes, please.All right.No, thank you.

5.would you…的回答方式有以下几种：Yes, I will. (No, I won’t.)Sure . (I’m sorry , I can’t.) All right/ OK/ With pleasure.Certainly. (No, thank you .)Yes, please.

【例题】—Would you do me ass on my thanks to Lily?—________.

A.That’s right

B.With pleasure D.No tro uble

【解析】A.意为“对了”，B.意为“乐意效劳”, C.意为“没关系” D.意为“不费事”。答案：B

考点三:不同情态动词的否定意义也不同：

1.（1）.can’t可译为“不会”，如：I can’t play basketball.我不会打篮球。

（2）当句子表推测时，用can’t表达不可能，如：He can’t be ill. He is playing chess with Tom.他不可能病了，他正和Tom下棋呢。

（3）can’t还可用来回答“ May I …? ”这样的问句。如：May I come in ? 我可以进来吗？No, you

（4）can’t还可用于固定习语中。can’t help doing禁不住，情不自禁

can’t wait to do something迫不及待地要做…

如：She can’t help crying.她不禁大哭起来。

The children can’t wait to open the box.孩子们迫不及待地想打开盒子。

2. may的否定式为may not，译成“可能不”，如：He may not be at home.他也许不在家。

考点四:情态动词的被动语态

含有情态动词的被动语态的结构为：情态动词+ be + done (动词的过去分词)。做题时要兼顾情态动词和被动语态这两个方面。She should speak to her mother in that way.她不应该用那种方式和妈妈说话。More and more trees must be planted in China.在中国必须种植更多的树木。Many of the stars can not be seen because they are far away from us.很多星星我们都看不到，因为它们离我们太远了。

考点五:情态动词表示推测的用法:

一、“情态动词+动词原形”表示对现在的推测。

1、can表示推测时一般用于否定句或疑问句。如：That man can＇t be her husbandshe is still single. Who is knocking at the door?Can it be the postman?

2、must表示肯定的推测，一般用于肯定句中。如：He must be in his office now.Mr Li must be working now，for the lights in his office are still on.

3、might表示推测时不一定是may的过去时，只是表示其可能性较小。如：The man may be the headmaster.

—Where is Mr Li?—He might be working in his office. —May Mr Li come?—He might not come here.

4、Could表示推测时，语气can比要弱，说话者留有余地。如：—Could it be an animal?—It could not be，because it is not moving.

5、Should表示推测的可能性比较大，仅比must的可能性小一点。如：It is already 10 o’clock now they should be there.

【情态动词易混点归纳】

易混点一: can和be able to:

两者表示能力时用法相同，但can只有原形“can”和过去式“could”两种形式，在其他时态中要用be able to来表示。另外be able to常常指经过努力，花费了时间和劳力之后才能做到

说英语。We’ll be able to see him next week.下星期我们将会见到他。He has been able to drive.他已经会开车了。I’m sure you’ll be able to finish it quickly.我相信你能迅速地完成。We were able to reach the top of the mountain at noon.我们能在中午到达山顶。

易混点二:can和may

1. can和may均可用来征求意见或许可，意为“可以”，一般可互换使用。如：Can/ May I help you ? 我能帮助你吗？

2. can和may表示可能性时的区别：

1)在肯定句中用might，may，must，不用can

2)在疑问句中表示推测用can，不用might，may，must

3)在否定句中用can’t（不可能），不用may，must。如：She may be in the classroom .她可能在教室里。Where can they be now?他们现在可能在哪儿？That can’t be true.那不可能是真的。

易混点三: may be和maybe

用法区别常用位置

may be may为情态动词，be为动词原形句中，作谓语

maybe 副词，大概、也许，相当于perhaps 句首，作状语

例如：He may be wrong , but I’m not sure.也许他错了，但我也不确定。

易混点四：can’t和mustn't

1. can’t根据其基本用法可译为：

（1）不会。如：I can’t speak English .我不会说英语。

（2）不能。如：We can’t do it now because it’s too dark.天太黑了，我们现在干不了。

（3）否定句中表示推测。“不可能”，如：The man can’t be our teacher because he is much younger than our teacher..那个人不可能是咱们老师，他年轻得多。

2.mustn't 意为“禁止，不许",用来表示命令，表示强烈的语气。如：You mustn't play football in the street .It's too dangerous.

易混点五：must和have to

1.must侧重于个人意志和主观上的必要。have to侧重于客观上的必要，可用于现在时、过去时和将来时。如：I know I must study hard.我知道我必须努力学习。My brother was very ill, so I had to call the doctor in the mid-night.我弟弟病得厉害，我只得半夜里把医生请来。I haven’t got any money with me, so I’ll have to borrow some from my friend.我身上没带钱，只好向朋友借点了。He said they must work hard.他说他们必须努力工作。

hand in this morning, so I had to finish it last night.作文今天早晨到期，因此我不得不昨天晚上完成。

易混点六: used to do / be used to doing / be used to do…/be used for doing

used to do表示过去常常发生的动作，强调过去，只用于过去，注意用to do，不用doing形式；而be used to doing意为“习惯做…”，be可有各种时态；be used to do意为“……被使用去做……,”为被动语态形式。be used for doing 用作……”如：My father used to eating meat.我父亲过去起床晚，但现在不得不早起了。She is used to eating meat.她习惯吃肉。He wat used to eating in a restaurant.他不习惯在饭店吃饭。A knife can be used for cutting things.(刀可以用来割东西)/ A knife can be used to cut things.(刀可以用来割东西)

单选题

( ) 1 John___ come to see us tonight, but he isn't very sure yet.

A.may

B. can

C. has to

D. must

( ) 2 They ___ do well in the exam.

A.can be able to

B. be able to

C. can able to

D. are able to

( ) 3 -May I take this book out? -No, you___.

A.can't

B. may not

C. needn't

D. aren't

( ) 4 You___ go and see a doctor at once because you're got a fever.

A.can

B. must

C. dare

D. would

( ) 5 -Can you speak Japanese? -No, I____.

A.mustn't

B. can't

C. needn't

D. may not

( ) 1 -He___ be in the classroom, I think.

-No, he ___ be in the classroom. I saw him go home a minute ago.

A. can; may not

B. must; may not

C. may; can't

D. may; mustn't

( ) 2 -Shall I get one more cake for you, Dad?

-Thanks, but you___, I've had enough.

A. may not

B. must not

C. can't

D. needn't

( ) 3 Even the top students in our class can't work out this problem, so it ___be very difficult.

A.may

B. must

C. can

D. need

( ) 4 He isn't at school. I think he ___ be ill.

A.can

B. shall

C. must

D. has to

( ) 5 ___ I take this one?

A.May

B. Will

C. Are

D. Do

( ) 1 The children___ play football on the road.

A.can't

B. can

C. mustn't

D. must

( ) 2 You ___ be late for school again next time.

A.mustn't

B. needn't

C. don't have to

D. don't need to

( ) 3 -Must I do my homework at once? -No, you___.

A.needn't

B. mustn't

C. can't

D. may not

A.has not to

B. don't have to

C. haven't to

D. doesn't have to

( ) 2 He had to give up the plan, ___ he?

A.did

B. didn't

C. does

D. doesn't

( ) 3 They had to walk here, ___ they?

A.mustn't

B. did

C. didn't

D. hadn't

( ) 1 He had better stay here, ___ he?

A.didn't

B. don't

C. hadn't

D. isn't

( ) 2 You'd better___late next time.

A.not to be

B. not be

C. won't be

D. don't be

( ) 3 You'd better ___ your hair ___ once a month.

A.had; cut

B. had; cutted

C. have; cut

D. have; cutted

( ) 4 You___ ask that man over there. Maybe he knows the way.

A.had better not to

B. had not better

C. had better

D. had better not

( ) 1 -Shall we go and visit the History Museum next Sunday?

A.Here you are

B. Sorry, I can't

C. Yes, please

D. Let me try

( ) 2 -Why don't you ask Mike to go with us? -Thanks, ___.

A. I will

B. I won't

C. lean

D. I may

( ) 3 -___ I take the newspaper away? -No, you mustn't. You____read it only here.

A.Must; can

B. May; can

C. Need; must

D. Must; must

( ) 1 Excuse me. ___ you please pass me that cup?

A.Do

B. Should

C. Would

D. Must

( ) 2 ___ you like to have another try?

A.Could

B. Will

C. Would

D. Do

( ) 3 -Would you like to go boating with us? -Yes, ___.

A.I'd like

B. I want

C. I'd like to

D. I do

( ) 1 You___ worry about your son. He will get well soon.

A.needn't

B. can't

C. mustn't

D. have to

( ) 2 The poor man needs our help, ___ he?

A.need

B. needn't

C. does

D. doesn't

( ) 3 -Must we do our homework first? -No, you___. You may have a rest first. A. mustn't B. needn't C. may not D. can't

参考答案： 1. 1-5 A D A B B2. 1-5 C D B C A3. 1-3 C A A4. 1-3 D B C5. 1-4 C B C C6. 1-3 B A B 7. 1-3 C C C8. 1-3 A D B

单选二

1. I told Sally how to get here, but perhaps I _______ for her.

A. had to write it out

B. must have written it out

C. should have written it out

D. ought to write it out

2. —There were already five people in the car but they managed to take me as well. —It _______

a comfortable journey.

A. can’t be

B. shouldn’t be

C. mustn’t have been

D. couldn’t have been 3. It’s nearly seven o’clock. Jack _______ be here at any moment.

4. Johnny, you _______ play with the knife, you _______ hurt yourself.

A. won’t; can’t

B. mustn’t; may shouldn’t; must D. can’t; shouldn’t

5. The fire spread through the hotel very quickly but everyone _______ get out.

A. had to

B. would

C. could

D. was able to

6. —When can I come for the photos? I need them tomorrow afternoon.

—They _______ be ready by 12:00.

A. can

B. should

C. might

D. need

7. —I stayed at a hotel while in New York.

—Oh, did you? You _______ with Barbara.

A. could have stayed

B. could stay

C. would stay

D. must have stayed

8. —Are you coming to Jeff’s party?

—I’m not sure. I _______ go to the conce rt instead.

A. must

B. would

C. should

D. might

9. I was really anxious about you. You _______ home without a word.

A. mustn’t leave

B. shouldn’t have left

C. couldn’t have left

D. needn’t leave

10. —Is John coming by train?

—He should, but he _______ not. He likes driving his car.

A. must

B. can

C. need

D. may

11. A left-luggage office is a place where bags _____ be left for a short time, especially at a railway station.

A. should

B. can

C. must

D. will

12. I wonder how he _______ that to the teacher.

A. dare to say dare saying C. not dare say D. dared say

13. When he was there, he ___ go to that coffee shop at the corner after work every day.

A. would

B. should

C. had better

D. might

14. It has been announced that candidates _____ remain in their seats until all the papers have been collected.

A. can

B. will

C. may

D. shall

15. How ______ou say that you really understand the whole story if you have covered only a part of the article?

A. can

B. must

C. need

D. may

16. —I hear you’ve got a set of valuable Australian coin. _______ I have a look? —Yes, certainly.

A. Do

B. May

C. Shall

D. Should

情态动词练习参考答案

1. C。―ought to / should have+过去分词‖表示后悔当初该做但却没做某事。―…也许我本该把详细地址写给她的。‖

2. D。―couldn’t have+过去分词‖表示对过去情况的推测。既然小汽车上―已有五人‖，且是―设法‖才把你带去的，如此拥挤，旅途当然―不可能‖舒服。

3. C。nearly 暗示―时间不早了‖，Jack―按理应当(should)随时(at any moment)‖都有可能到达这里。must 语气过强；can 一般不用于肯定推测；need 意义不通，也不用于肯定句。

4. B。mustn’t(不许、千万不)表示禁止。may 表示可能性。句意为―你千万不要玩刀子，可能会弄伤自己的‖。

5. D。表示过去具体某次―能够‖做成某事只能用was / were able to 而不用could。

客可能走掉。

7. A。could have done 表示本可以做但却没有做的事。句意为―你本来可以住在 Barbara 那儿的‖；而 must have done 只表示有把握的肯定推测，这与前面具有疑问语气的 Oh, did you?不符。

8. D。语境明显提示―我可能(might)要去听音乐会‖。

9. B。表示轻微的责备，句意为―我真的好担心你啊。你当时本不该不说一声就离开家的‖。

10. D。由―他自己喜欢开车‖这一习惯推断，―他可能不会(may not)坐火车来‖。can not―不可能‖，语气太肯定。

11. B。can 表示―可以‖。should(应该), must(必须), will(愿意)均不符合语境。

12. D。dare 作行为动词时,一般接 to do，但疑问式或否定式中 to 可以省略，此句有疑问口气。

13. A。would 表示过去的习惯。

14. D。在规章中告诫应考者，在收完所有试卷前―必须‖留在教室里。

15. A。can 在疑问句中，表示疑惑、怀疑，根据情况可译作―能、可以‖等。

16. B。may 表示请求对方允许，即：―我可以做…吗?

写作：

你长大了想干什么？请你用英语写一篇作文，内容应包括以下几方面：

1.你将来想从事的职业。

2.你想从事这种职业的原因

3.怎么做才能实现你的理想。

1. --- Where is Mary?

--- She ____ in the library.

A. should be

B. must be

C. can be

D. must have been

2. His room is dark. He must ____ to bed.

A. go

B. be going

C. have gone

D. have been gone

3. “Will your father stay home tonight?”

“I’m not sure, He ____to work.”

A. must go

B. can go

C. may be gone

D. may be going

4. “Where is Tom?”

“He isn’t here I think he ____ have gone home.”

A. may

B. must

C. might

D. A or B or C

5. “I think Helen is at home.”

“No, she ____ be at home, for she phoned me from the airport just five minutes ago.”

A. mustn’t

B. needn’t

C. can’t

D. daren’t

6. He’s late. What ____ have happened to him?

A. can

B. may

C. should D, must

7. “ _____ he be watching TV now?”

“Yes, he _____ be watching TV now.”

“No, he _____ be watching TV now.”

A. Must; can; mustn’t

B. Can; must; can’t

C. Must; must; can’t

D. Can; can; mustn’t

“Yes, he ____ yesterday.”

“No, he ____ yesterday.”

A. Must; must have left; can’t have left

B. Can; can have left; can’t have left

C. Can; must have left; can’t have left

D. May; must have left; shouldn’t have left

9. You must be a writer, ____ you?

A. mustn’t

B. are

C. must

D. aren’t

10. You must have seen her yesterday, ____ you?

A. mustn’t

B. haven’t

C. didn’t

D. don’t

11. You must have seen her, ____ you?

A. haven’t

B. didn’t

C. don’t

D. A or B

12. There was plenty of time. She ____ worried or hurried.

A. mustn’t have

B. shouldn’t have

C. must be

D. needn’t have

13. I got up early, but I ____ so because I had no work to do that morning.

A. mustn’t have done

B. didn’t need to do

C. needn’t have done

D. can’t have done

14. I ____ up early this morning. So I stayed in bed till 9 a. m.

A. needn’t have got

B. didn’t need to ge t

C. shouldn’t have got

D. can’t have got

15. The flower is dead. I ____ it more water.

A. will give

B. would have given

C. must give

D. should have given

16. He ____ have come here yesterday, but he didn’t.

A. could

B. should

C. ought to

D. A or B or C

17. “Must he do it?”

“No, he ____.”

A. mustn’t

B. needn’t

C. doesn’t have to

D. B or C

18. “Need you go now?”

“Yes, I ____.” “No, I ____.”

A. need; needn’t

B. must; needn’t

C. m ay; mustn’t

D. can; needn’t

19. “May I borrow your bike?”

“No, you ____.”

A. mustn’t

B. may not

C. had better not

D. can’t

20. “Can I do it?”

“No, you ____.”or “No, please ____.”

A. can’t; doesn’t

B. can’t; don’t

C. can’t; can’t

D. can’t; you don’t

21. I missed the last bus, so I ____ go home on foot.

A. must

B. have to

C. may

D. had to

22. We ____ hurry if we want to arrive in time.

A. must

B. need

C. may

D. have to

23. He ought to have won the first prize, ____ he?

A. oughtn’t

B. shouldn’t

C. mustn’t

D. oughtn’t to

24. He ____ get up early when he lived in the countryside.

A. would

B. used to

C. mustn’t

D. can’t

25. My brother ____ be very naughty, and my sister ____ like reading.

A. used to; would

B. would; used to

C. used to; used to

D. would; would

26. ____ you please pass on a message to him?

A. Do

B. Shall

C. May

D. Will

27. ____ we set off now?

A. Shall

B. Will

C. Would

D. ought

“Yes, please.”

A. Does

B. will

C. Shall

D. Would

29. I’ve told him many times, but he ____ listen to my advice.

A. shall not

B. won’t

C. will not

D. wouldn’t

30. “Will you lend me a hand?”

“Yes, I ____.”

A. will

B. shall

C. can

D. may

1-5 BCCDC 6-10 ABCDC 11-15 DDCBD 16-20 DDBDB 21-25 DDDDC26-30 DACDA

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