高中英语语法——情态动词总结(附带练习).doc

情态动词总结
 I 情态动词的特征：
1. 本身有词义。
2. 不能独立作谓语。
2. 后接动词原形一起构成谓语。
3. 不随人称和数的变化。
II 情态动词各自的基本意义及用法：
1. can 与could用法
对比点
can
could
1、表“能力”
Can you lift this heavy box?
I couldn’t understand what he said at all.
2、表“许可”
You can use a different material instead.
He said I could borrow his bike.
3、“怀疑”
No, no, it can’t be true.
What on earth can this mean?
We thought the story could not be true. How could you be so careless?
4、can与be able to 区别
1. could代替 can，表示语气更为婉转。
Eg. Could I use your bike?
Yes, I can
2. can (能够)=be able to(仅表能力时)，但be able to 表示一番努力后，
才能做得到，且有更多的时态。
2.may与 might用法
对比点
may
might
1．表“询问”
May I …?(=Can I …?)
Might I …?(=Could I…?)
(但比用may 更客气)
2.表“允许”
You may take the boy there.
He told me he might come.
(might 与told相呼应)
3．表“可能”“或许”
She may nor like this place.
I’m afraid he might not like this play.
注：
1. May I…?的答语。
2. may可表示期望或祝愿
May you succeed !
3. may (might) 用于目的状语从句。
肯定：Yes, you may.
否定：No, you mustn’t 不行
（语气强硬）
No, you may not 或No, you’d better not.
The emperor gave them some gold in order that they might begin their work at once.
3. must与have to用法
对比点
must
have to
1. 表“必须”
（主观看法）必须；没有过去式，可用于间接引语中。
He told me I must do according to what he said.
（客观需要）不得不，有多种时态。It’s raining heavily, we can’t go now.
2. 疑问句
Must I …? Yes, you must.（一定）
No, you needn’t./ you don’t have to.
(不必)
Do you have to go today?
Yes, we do.
You don’t have to worry about that.
4. need与dare用法
对比点
need
dare
1.情态v.+动词原形
1）否定式
2）疑问式
He need not (needn’t)go.
---Need we do it again?
---No, you needn’t do it again.
He dare not say so.
Dare she go out alone at night?
How dare you say I’m unfair?
If he dare do that, he’ll be punished.
I dare say. (固定用法)
2.实义v. +to do 1）肯定式
2）否定式
3）疑问式
He needs to go.
He doesn’t (does not) need to go.
Does he need to do it again?
No, he doesn’t need ot do it again.
He dares to say.
He does not(doesn’t)dare to say.
If you dare to jump into the water from here, so dare I .
3. did not need to do表示过去没必要做
She didn’t need to attend the meeting yesterday, and she stayed with her children.(她没有参加)
5. should与ought to用法
对比点
should
ought to
1、表“应该”
表劝告、建议
You should listen to the doctor’s advice.
We should learn from Zhang Hua.
“有责任有必要”做某事
You ought to finish your work before you go home.
We ought to help each other.
2、表“估计”

They should get home by now.
“非常可能”的事，可译为“总应该”
If we start to work right now, we ought to finish it before lunch.
注：
1）should还可在虚拟语气中的使用
2) 注意：ought to的疑问式及否定式
---Ought he to go? ---Yes, I think he ought to. ---No, he oughtn’t to.
否定式：oughtn’t to do (不说ought to not do) 反疑问句：oughtn’t ______?
6. shall与will用法
shall
will
1. 征询对方意见或请求指示，用于第一、三人称：Shall I (we)…? Shall he (she)…?
Where shall I (we)wait for you?
1. 询问对方的意思或向对方提出要求：
Will you (please)…? Won’t you…?
Would you like to...? (would替代will更客气)
Won’t you go and see the film?你不去看电影吗---Yes, I think I will. 不， 我想去。
2. 表示说话人的“意愿”有“命令”“警告”“强制”“允诺”“决心”等，用于第二、三人称。
You shall do what I tell you ( to do).
我叫你干什么你就干什么。
Everything shall be done to save the ship.
一定要竭尽全力来拯救这艘船。
2. 表示“意志”“意愿”，用于各种人称：
I won’t do anything you don’t like.
我不会做任何你不喜欢的事。
Would表示过去时间的“意志”“意愿”
Shylock would not take the money earlier.
夏洛克先前是不肯要钱的。
7. used to与would用法
used to
would
1.表示过去的动作、状态，重在与现在情况的对比，不一定要有时间状语。
I used to play cards a lot, but now I seldom play.
My hometown is not what it used to be.
1.只表示过去动作的重复，有明确的时间状语。
I would go to see my grandfather on Sunday when he was in the middle school.
2.would 后只接表动作的动词，不接表认识或状态动词
He used to be nervous in the exam.
2. 表示过去的习惯有时可互换：
When we were very young, we used to / would go skating every winter.
3. 表示过去的次数时，不能使用：
( √）We went to the Great Wall five times when we were young.
( X ) We used to go / would go to the Great Wall five times when we were young.
注：used to do的否定式：usedn’t to do 或didn’t use to do (usedn’t也可写作usen’t)
疑问式： Did you use to do ? Didn’t you use to do?
Used you to do? Usedn’t you to do?
II 情态动词表推测：
1. 大多数情态动词（除表‘能力、许可、意志’外），都可以表示推测，其程度有差异。
按可能性程度的高低排列为：must ﹥will ﹥would ﹥ought to ﹥ should
完全肯定 完全可能 很可能
﹥ can ﹥ could﹥ may ﹥ might
可能 有可能
2. 区分情态动词的否定含义：may not或许不、可能不 might not可能不 can’t 不可能
mustn’t不许、禁止 shouldn’t不应该 needn’t 不必
3. 情态动词表推测具体运用：情态动词可以对现在、进行、过去推测。
S主+情态动词 + be + adj
对“性质”“特征”的推测
S主+情态动词 + be + n
对“职业”“事物”的推测
S主+情态动词 + 动词原形
对经常性行为的推测
S主+情态动词 + be + V-ing
对进行着的行为的推测
S主+情态动词 + have + PP
对过去的行为的推测
情态动词表推测时：1、can只能用于否定句和疑问句
2、must只能用于肯定句（它的否定句和疑问句其实就用can来代替了）
3、如句中有情态动词 + 完成时，定是对过去的推测 。
4、句中如有表示不肯定的话语
E.g I am not sure; I don’t know 之类，常选may /might的各种形式。

4. 表示反劝的特殊的表推测形式
1). could + have + P.P.
表示本来能做到，但事实上没有做到。
He could have finished the task on time, but the heavy snow came.
2) . couldn’t +have + P.P.
表示本来不能做到，但已经做到了。
She could not have covered the whole distance, but in fact she arrived ahead of time.
3) needn’t + have + P.P.
表示本不必做的，但已经做到了。
She needn’t have attended the meeting yesterday, but she did.
4. ) should/ought to +have + P.P.
表示该做而没有做
The plant is dead. I should/ought to have given ot more water.
5) shouldn’t/ oughtn’t to +have + P.P.
表示不该做而做了。
You oughtn’t to / shouldn’t have taken her bike without permission.
5. 注意：
must只能用于肯定句（它的否定句和疑问句其实就用can来代替了）
1. must + have + P.P.
表示对过去肯定的推测，“一定是，准是”
The road is wet. It must have rained yesterday.
2. can + have + P.P.
表示对过去的推测（限于问句中）
Can she have said so? 他可能这样说吗？
3. can’t + have + P.P.
表示对过去的否定推测
He cannot have said such a foolish thing.
III 情态动词表推测的反意疑问句
1. 情态动词表推测的反意疑问句，简单来说，就是以情态动词后的时态为淮，如句子里有明确的时间状语，则以其为准。
2. 以 must 为例：
E.g. 1. You must be hungry now, aren’t you?
2. He must be watching TV , isn’t he ?
3 Tom must have lived her for a long time, hasn’t he ?
4. She must have arrived yesterday, didn’t she?
注：如选择题中（以She must have arrived yesterday, didn’t she？为例）既有didn’t she又有hasn’t she则以didn’t she？为最佳答案。

IV 情态动词专项练习与解析一
( ) 1. You _____ return the book now. You can keep it till next week if you like.
A. can’t B. mustn’t C. needn’t D. may not
( ) 2. Where is my pen? I _____ it.
A. might lose B. would have lost C. should have lost D. must have lost
( ) 3. I wish I _____ you yesterday.
A. seen B. did see C. had seen D. were to see
( ) 4. I didn’t hear the phone. I _____ asleep.
A. must be B. must have been C. should be D. should have been

( ) 5. If my lawyer _____ here last Saturday, he _____ me from going.
A. had been; would have prevented B. had been; would prevent
C. were; would prevent D. were; would have prevented
( ) 6. He _____ you more help, even though he was very busy.
A. might have given B. might have C. may have given D. may give
( ) 7. If it _____ for the snow, we _____ the mountain yesterday.
A. were not; could have climbed B. were not; could climb
C. had not been; could have climbed D. had not been; could climb
( ) 8. Without electricity human life _____ quite difficult today.
A. is B. will be C. would have been D. would be
( ) 9. A computer _____ think for itself, it must be told what to do.
A. can’t B. couldn’t C. may not D. might not
( ) 10. Jenny _____ have kept her word. I wonder why she changed her mind.
A. must B. should C. need D. would
( )11. We _____ last night, but we went to the concert instead.
A. must have studied B. might study
C. should have studied D. would study
( ) 12. — Could I borrow your dictionary?
— Yes, of course you _____.
A. might B. will C. can D. should
( ) 13. Tom ought not to _____ me your secret, but he meant no harm.
A. have told B. tell C. be telling D. having told
( ) 14. — If he _____, he _____ that food.
— Luckily he was sent to the hospital immediately.
A. was warned; would not take B. had been warned; would not have taken
C. would be warned; had not taken D. would have been warned; had not taken
( ) 15. Peter _____ come with us tonight, but he isn’t very sure yet.
A. must B. may C. can D. will
( ) 16. 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
( ) 17. I didn’t see your sister at the meeting. If she _____, she would have met my brother.
A. has come B. did come C. came D. had come
( ) 18. — Shall I tell John about it?
— No, you _____. I’ve told him already.
A. needn’t B. wouldn’t C. mustn’t D. shouldn’t
( ) 19. When a pencil is partly in a glass of water, it looks as if it _____.
A. breaks B. has broken C. were broken D. had been broken

( ) 20. It’s nearly seven o’clock. Jack _____ be here at any moment.
A. must B. need C. should D. can
( ) 21.— 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
( ) 22. Johnny, you _____ play with the knife, you _____ hurt yourself.
A. won’t; can’t B. mustn’t; may C. shouldn’t; must D. can’t; shouldn’t
( ) 23. The fire spread through the hotel very quickly but everyone _____ get out.
A. had to B. would C. could D. was able to
( ) 24. — 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
( ) 25. — 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
( ) 26. — Will you stay for lunch?
— Sorry, _____. My brother is coming to see me.
A. I mustn’t B. I can’t C. I needn’t D. I won’t
( ) 27. — Are you coming to Jeff’s party?
— I’m not sure. I _____ go to the concert instead.
A. must B. would C. should D. might
( ) 28. — Write to me when you get home.
— _____.
A. I must B. I should C. I will D. I can
( ) 29. 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
( ) 30. — Is John coming by train?
— He should, but he _____ not. He likes driving his car.
A. must B. can C. need D. may

专项练习（二）
1. I didn’t see her in the meeting room this morning. She _____ at the meeting.
A. mustn’t have spoken B. shouldn’t have spoken
C. needn’t have spoken D. couldn’t have spoken
2. One ought _____ for what one hasn’t done.
A. not to be punished B. to not be punished
C. to not punished D. not be punished
3. If you really want yourself to be in good health, you must ___ always ___ so much.
A. not; be smoking B. not; have smoked
C. not; to smoke D. be not; smoking
4. With so much work on hand, you _____ to see the game last night.
A. mustn’t go B. shouldn’t go
C. couldn’t have gone D. shouldn’t have gone
5. Most of the students felt rather disappointed at the English party. They say that it ______ better organized.
A. had been B. had to be C. must have been D. could have been
6. I’m surprised that he _____ in the exam.
A. should fail B. would have failed
C. may have failed D. should have failed
7. The little girl _____ there alone.
A. not dare go B. dares not go C. dare not go D. dare not to go
8. “Must we do it now?” “No, you _____.”
A. won’t B. needn’t C. can’t D. don’t
9. He said he would rather not _____ it right now.
A. doing B. to do C. do D. to be doing
10. 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 coming D. needn’t come
11. Put on more clothes. You _____ be feeling cold with only a shirt on.
A. can B. could C. would D. must
12. I _____ play football than baseball.
A. would rather B. had better C. like better D. prefer
13. I thought you _____ like something to read, so I have brought you some books.
A. may B. might C. could D. must
14. There was plenty of times. She _____.
A. mustn’t have hurried B. couldn’t have hurried
C. must not hurry D. needn’t have hurried
15. The plant is dead. I _____ it more water.
A. will give B. would have given
C. must give D. should have given
16. You _____ return the book now. You can keep it till next week if you like.
A. can’t B. mustn’t C. needn’t D. may not
17. It’s still early, you _____.
A. mustn’t hurry B. wouldn’t hurry
C. may not hurry D. don’t have to hurry
18. Please open the window, _____?
A. can’t you B. aren’t you C. do you D. will you
19. We _____ for her because she never came.
A. mustn’t have waited B. shouldn’t have waited
C. mustn’t wait D. needn’t wait
20. — May I stop here? — No, you _____.
A. mustn’t B. might not C. needn’t D. won’t
21. It’s a fine day. Let’s go fishing, _____.
A. won’t we B. will we C. don’t we D. shall we
22. I didn’t see her in the meeting room this morning. She _____ at the meeting.
A. mustn’t have spoken B. shouldn’t have spoken
C. needn’t have spoken D. couldn’t have spoken
23. — Please don’t make a noise. — _____. I’ll be as quiet as a mouse.
A. Yes, I won’t B. No, I won’t C. No, I will D. Yes, I will
24. The young man has made so much noise that he _____ not have been allowed to attend the concert.
A. could B. must C. would D. should
25. — Where is John? — He _____ in the library.
A. should be B. must be C. can be D. must have been
26. Since the road is wet this morning,