九年级英语情态动词总复习

情态动词
湖北省咸宁市通城县关刀中学：卢翠松
一．情态动词的语法特征
情态动词本身虽有词义，但只表示说话人的看法，命令，准许等；不能单独作谓语，须与实义动词构成谓语
1情态动词 除ought to，have to， used to外，其它情态动词后面只能接不带to 的不定式。 2情态动词没有人称，数的变化，即情态动词第三人称单数不加-s。
二. 一些容易混淆的用法
1. 比较can 和be able to
can/could 表示能力(born ability, learned ability), 只用于现在式和过去式(could)。
could不表示时态 .提出委婉的请求，（注意在回答中不可用could）。
--- Could I have the television on --- Yes, you can. / No, you can't.
表示经过努力或在一定条件下设法成功地做了某事时，而非能力，只能用was/were able to， 不能用could。=managed to do sth./ succeeded in doing sth.
He was able to flee Europe before the war broke out.
2. 比较have to和must have to有人称、数、时态的变化，而must只有一种形式。
have to 表示客观的需要， must 表示说话人主观上的看法，既主观上的必要。 My brother was very ill, so I had to call the doctor in the middle of the night.　
I want to take more exercise, so I must walk to school every day.
must 问句的回答 e.g. Must I wait until they come ---Yes, you must.
---No, you needn’t./ don’t have to/ don’t need to
在否定结构中： don't have to　 表示"不必" mustn't表示"禁止， 不允许"，带有很强的语气 e.g. You don't have to tell him about it.　 你不一定要把此事告诉他。
3 can/could 和 may/might . can和 may都可表示请求，或给与许可。Can 语气一般，could/may 比较礼貌，常用。对于can/could的回答,一般是can/can’t,不可用could，而对may的回答，则是may/may not。
----Could I use your legtop ----Yes, of course you can./ Sorry, I am afraid you can’t .
---May I leave the classroom
---Yes, you may. / No, you mustn’t/you may not/ you don’t have to.
4. ought to , should
表示义务，责任, 都为"应该"的意思，可用于各种人称。表示要求，命令时，语气由 should（应该）、had better最好）、must（必须）渐强。
---Ought he to go ---Yes. I think he ought to.
5. shall, will shall 用于疑问句，第一，三人称，表示愿意效劳以征求同意，或提出建议征询意见。Shall I carry the luggage for you, Miss Li
用于第二，三人称陈述句中，可表示说话人给对方的命令，承诺，警告或恐吓等。
Nothing shall stop us from doing good. .
will 表示主语的愿意, 决心, 承诺. If you will listen to me, I will help you.
表示物体的属性,或人或动物的习性. Oil will float on water. Fish will die out of water.
6 used to ／ would
1)都可表示过去习惯，但used to强调过去经常或习惯于做某事，但现在已不做了，强调与现在的对比，而 would 单纯就表示过去的习惯行为
Pollution is still a problem, but it used to be worse.
Sometimes she would bring me some small presents when she was in a good mood.
2)used to 的否定形式是usedn’t to do / didn’t use to do
There used to be a tall tree here, usedn’ there/ didn’t there
三. 情态动词can, could, may, might, must表示推测的用法 其用法如下：
1. Can / could 用于疑问句表示猜测，可能,could 一般不表示时态，只表达委婉语气.
can’t / couldn’t 表示不可能; couldn’t 一般不表示时态，只表达委婉语气.
但在过去时态的宾语从句只能用couldn’t.
I believe him. He can’t e such an irresponsible man.
I thought you couldn’t have met her yesterday.
2.may/might may/might用于肯定句，表示没有把握的推测； might 表示推测时，不表示时态, 只是可能性比may 小, 但在过去时态的宾语从句只能用might.
He might be at home. Philip may (might) have been hurt seriously in the car accident.
3 must用在肯定句中表示较有把握的推测，意为"一定"。
You have worked hard all day. You must be tired.　
4. 这些表示推测的情态动词使用时的时态构成
（1）情态动词+动词原形。表示对现在或将来的情况的推测，此时动词通常为系动词。
　　I don't know where she is, she may be in Wuhan.
（2）情态动词+动词现在进行时.表示对正在进行的情况进行推测。
　　At this moment, our teacher must be correcting our exam papers.
（3）情态动词+动词完成时。表示对过去情况的推测
The road is wet. It must have rained last night.
(4) 情态动词+动词的现在完成进行时.表示对过去正在发生事情或一个完成进行的动作的推测.Your mother must have been looking for you.
四.特殊用法
1 need作实义动词He needs to take a rest. He needs some time to think it over.
The recorder needs repairing/ to be repaired
needn't have done sth　 本没必要做某事,但实际做了。
I dressed very warmly for the trip, but I needn't have done so. The weather was hot.
2 may 放在句首，表示祝愿。May the world be full of love. May God bless you!
3 can 的惯用语 can but do …只好 We can but do our best. 我们只好尽全力了
cannot( choose / help) but do 不得不I can’t help but admire your courage.
can’t help doing不禁 I can’t help liking her though she can be annoying sometimes.
can’t …too 无论…也不过分,越…越好 We can’t be too careful while driving.
as…as one can ----as…as possible
1. Sorry I`m late . I ____ have turned off the alarm clock and gone back to sleep again.
A. might B. should C. can D. will
2. My sister met him at the Grand Theater yesterday afternoon, so he ___ your lecture.
A. couldn`t have attended B. needn`t have attended
C.mustn`t have attended D. shouldn`t have attended
3. Jack ____ yet , otherwise he would have telephoned me.
A. musn`t have arrived B. shouldn`t have arrived C. can`t have arrived
D. need not have arrived
4. 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
5. 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
6. Is John coming by train ----He should , but he ____ not . He likes driving his car.
A. must B. can C. need D. may
7. I hear you`ve got a set of valuable Australian coins. _____ I have a look.
Yes , certainly.A. Do B. May C. Shall D .Should
8. Mr Bush is on time for everything. How ____ it be that he was late for the opening ceremony
A. can B. should C. may D . must
9. 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
10. I should have been there , but I ____ not find the time.
A. would B. could C. might D. should
11. 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
12. 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
13. Could I borrow your dictionary -----Yes , of course you _____.
A. might B. will C. can D. should
14. 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
15. The fire spread through the hotel very quickly but everyone _____ get out.
A. had to B. would C. could D. was able to
16. 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
17.You must just as well tell the manufacturer that male customers ____ not take the design of the furniture.A. must B. shall C. may D. need
18. ----Isn`t that Ann`s husband over there
----No, it _____ be him--- I`m sure he doesn`t wear glasses.
A. can`t B. must not C. won`t D. may not
19. ---- Who is the girl standing over there
---- Well, if you ____ know, her name is Mabel.A.may B. can C. must D. shall
20. Children under 12 years of age in that country ____ be under adult supervision when in
public library.A. must B. may C. can D. need
21. “The interest ____ be divided into five parts, according to the agreement made by both sides,” declared the judge. A. may B. should C. must D. shall
22. ---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
23. --- Is John coming by train
---He should , but he ___ not . He likes driving his car.
A. must B. can C. need D . may
24. I wish to go home now, ____ I A. may B. can`t C. must D. do
25. He must have finished his homework for a long time , ____ he
A. mustn`t B. didn`t C. needn`t D. hasn`t
26. A wise man ____ sometimes make a mistake.A. may B. must C. would D. can
27. ---- _____ he ____ already ----He _____, for he is always in good manner.
A. Could; have left ; can`t have left B. Could ; have left; couldn`t have left
C. May; have left ; may not have left D. Must ; have left ; needn`t have left
28. I talked for a long time, and in the end I _____ make her believe me.
A. could B. can C. must D. was able to
29. How ____ there be such a thing
A. may B. can C. must D. will
30. ----What do you think of the food here
Oh, wonderful ! We ____ a better place.
A. won`t find B. mustn`t have found C. can`t find D . couldn`t have found
31. I ____ sit up all night , and that was harmful to my health.
A. should B. used to C. was used to D. got used to
32. There ____ an inn at the foot of the hill.
A. used to be B. used to have C. would be D . got used to having
33. He ___ have the book when I finish reading it .
A. will B. shall C. must D .ought
34. It is strange that he _____ say so .
A. shall B. will C. should D. ought
35. His advice ____ not be taken.
A. was needed B. needs C. need D. is needed
36. Be quiet ,please , or his voice ____ be heard .
A. can`t B. mustn`t C. isn`t able to D . may not
37. Why _____ you always interrupt me
A. can B. will C. may D. must
38. We _____ for her because she never came .
A. needn`t wait B. shouldn`t have waited C. mustn`t wait D. mustn`t have waited
39. ----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
40. If he ____ listen to me , I `ll be able to help him .
A. will B. shall C. 不填 D.should
41. If your children ____ do as I tell you, you ____ go to the party.
A. won`t ; shan`t B. 不填 ；will C. don`t ; won`t D. must ; shall
42. ---Will you open the door , please ----______
A. Will I what B. Shall I what C. What shall I D. What can I
43. He went on foot , but he ____ by bus .
A. should gone B. could have gone C. ought have gone D. could be gone
44. Man ___ die without air or water .A. will B. shall C. should D .would
45. He _____ you more help , even though he was very busy .
A. might have given B. might give C. may have given D. may give
1----5AACB 6---10 DBADB 11—15BBCBD 16-20 ACACA 21-25DDDAD
26-30 AADBD 31-35 BABCC 36-40 ADBBA 41-45 ABBAA