情态动词
一、概念
情态动词一般不能单独使用,有其自己的意思。和另一谓语动词连用构成谓语。不同的情态动词有不同的意思及用法。
二、情态动词分类
表示能力:can be able to
表示许可:can may
表示必须:must have to ought to should
表示虚拟:should could would
表示推测:must should can ought to need
其它:dare shall will
三、情态动词的主要用法
【表示能力】
can to able to 这两个都可以表示能力。can指单纯的表示一个人有某种能力。而be able
to则表示某人通过努力、克服困难做成某事。另外be able to还可以用于各种时态;can只能用于现在或过去(could)。
He can swim. Although he can’t swim, yet he was able to cross the river.
【表示许可】
can ( could ) may ( might )
可以表示许可。用它们的过去式,则语气更加委婉、客气。can主要用于第一、二人称。may主要用于第一人称。
Can you finish your work tonight Could I come to see you tomorrow
May I ask you a question Might I use your pen for a while
注意:用May I…征求对方的许可比较正式,语气比较客气;而用Can I….常用于口语中。
【表示必须】
must have to ought to should都可以表示必须、应该、必要。但它们用法各异。
Must 表示要做什么的愿望是发自内心的主动的;
I must study hard so that I can pass the entrance examinations of
college.
have to 指要做某事是被动的受某种压力而为的;
I have to study hard or my father will beat me.
ought to 表示应该、理应做什么;
You ought to clean the classroom , for it is your turn today.
should 表示应该多含有责备之一。
You should have cleaned the classroom yesterday, but you didn’t.
【表示虚拟】
should 用在表示请求、建议、命令等次后面的从句中,should可以省略。也可以用在if引导的条件状语从句中表示与将来事实可能相反。
would 用在含有if引导的条件状语从句的主句中。也可以用其它情态动词。
【其它情态动词的用法】
◎ need 作为情态动词表示“需要、必须”,仅用于否定句或疑问句。在肯定句中一般用must, have to, ought
to或should代替。
You needn’t come so early. Need I finish the work today
◎ dare 作为情态动词主要用于疑问句、否定句或条件状语从句中,一般不用于肯定句中。
How dare you say I’m unfair.
He daren’t speak English before such a crowd, dare he
◎ I dare say 是一个固定搭配。表示“我猜测,可能、或许”后面一般跟从句。
I dare say he will come.
◎ shall 用于第一人称,表示征求对方的意见(说话人做某事)。
What shall we do this evening
用于第一、第三人称疑问句中,表示说话人征求对方的意见或向对方请示。
Shall we begin our meeting
When shall he be able to leave the hospital
用于第二、第三人称,表示说话人给对方的命令、警告、允诺或威胁。
You shall fail if you don’t follow my advice. (警告)
He shall have the book when I finish reading. (允诺)
He shall be punished for what he has done. (威胁)
◎ will 一般用于第二人称表示请求、建议对方做某事;如果用would语气就更加委婉。
Will you pass me the dictionary Would you pass me the dictionary
也可以表示意愿、愿望和决心。
I will never do that again. They asked me if I would do that again.
◎ had better “最好做什么”
------ You’d better go now. ----- Yes, we had.
◎ would rather “宁愿做什么”
I’d rather not say anything. Would you rather stay here
I would rather watch TV than go to see the film.
◎ used to (过去)常常
He told us he used to play football when he was young.
Did you use to go the same school as your brother
= Used you to go to the same school as your brother
四、情态动词表示“推测”的用法
情态动词表示“推测”时,要记住“三种推测两种形式”。
◎ 三种推测: ①对过去发生动作或状态的推测;
②对现在状态的推测;
③对将来发生动作或状态的推测
◎ 两种形式: ①用情态动词加完成事态表示对过去发生动作或状态的推测;
②用情态动词加动词原型表示对现在或将来发生动作或状态的推测
must have done 表示过去一定做了什么,语气十分肯定
You must have finished your work.
can’t have done 表示过去不可能过了什么,语气也比较肯定(是上面的否定形式)
He can’t have gone to Beijing, for I had a talk with him just now.
needn’t have done 表示过去没有必要做什么但已经做了。
You needn’t have come earlier.
should have done 过去该做什么但没有做。(含有责备的意思)。
You should have started earlier.
shouldn’t have done 表示过去不该做什么但做了。(含有责备的意思)
You shouldn’t have helped him, he could do it himself.
would have done 表示过去会做什么,而没有做。
I thought he would have told you about it.
ought to have done 表示过去该做什么而没有做。(是职责和义务)
You ought to have helped him. (but you didn’t.)
must do sth. / must be doing sth. 表示现在或将来一定在做什么。
will be 表示推测,主要用于第二、三人称,是对目前情况的推测。
This will be the book you want to buy.
1. you may regard him as a hero, but you _______make him become a true hero.
A. may not B. can't C. mustn't D. shall not
2. A computer _______think for itself; it must be told what to do .
A. couldn't B. might not C. may not D. can't
3. _______going swimming this afternoon, mother
A .Am I able to B. Can I C. Can I be able to Shall I be able to
4. ---That must be a mistake.
No, it _______be a mistake .
A. mustn't B. needn't C. can't D. may not
5. This pen looks like mine, yet it isn't. Whose ______it be
A. must B. may C can D. will
6.---It ______be Jack who is in the library.
---I'm sure it _______be him .I saw him off at the railway station just two days ago .
A. can't …..can't B. mustn't …mustn't C. must ………can't D. can't… mustn't
7.Oh ,dear! what on earth ___________this mean
A . can B. may C. might D. would
8. How _________you be so rude to your customers!
A may B. can C . must D. ought
9. How ______he be so angry
A. must B. need C. could D. dares
10.---Could you borrow your dictionary
----yes , of course you ________.
A. might B. will C . can D. should
11._______ you tell me what's happening over there
A. May B. Might C. Could D . Shall
12.The children asked whether they ______go for a swim.
A. was able to B . can C. could D. may
13. He tried his best and ______swim to the river bank
A. could B. was able to C. might D. must
14. ---You _______problem yourself. It was not hard at all.
----Yes ,it was Tom who offered to help me with it .
A. hadn't worked out B. should work out C. could have worked out D. would work out
15. He asked me for the dictionary many times .Please tell him that he _______have it tomorrow.
A. must B. need C. may D. ought to
16. What _______he mean ________you tell me
A. can ….May B. can …..Can C. may ….May D. must …..Should
17. ---Might I have a cup of tea
----Yes ,you _____-.
A. might B. may C. can D. do
18. ---May I talk about it with anyone I like
-----No ,you __________.
A. shouldn't B. mustn't C. needn't D. don't need to
19. Peter ______come with us tonight , but he isn't very sure yet .
A. must B. can C. may D. will
20.The sky is cloudy .you 'd better bring your raincoat along .It_______ this afternoon.
A. may rain B. might rain C . should rain D . may have rained
21. She _______last night ,but I didn't see her .
A . may arrive B. might C. must have arrived D. might have arrived
22. ______you succeed!
A. Can B. May C. Must D. Will
23. These streams are so small that they ______be shown in the maps .
A. mustn't B. may not C. cannot D. might not
24. Mr. Wang _____be in America because I saw him in the street only an hour ago.
A. mustn't B. isn't able to C. may not D. cannot
25. There are twelve of us ,so ______get into the car at the same time.
A. we may not B. all we may not C. all we can't D. we can't all
26. She _______there now because I hear someone call her name .
A. maybe B. may be C. might be D. may have been
27. I wonder whose car it is. It __________be my neighbor's.
A ought B .should C. might D. can
28. ---Do you think it will snow
---I don't know . It ________.
A. might B. ought C. will D. seems
29. ---Must I do you a favor
----Yes , you ______.
---No, you________.
A. need …….mustn't B. must …..mustn't C. need ….needn't D. must …needn't
30. ---______I get there on time today
---- No .you needn't .
A. Can .B .May C. Must D. Should
31. A teacher _______do every exercise, but a pupil must.
A. may not B. needn't C. can't D. mustn't
32. Hurry up , comrades! We ________be late for the lecture .
A. can't B. mustn't C. may not D. needn't
33. Mr. Johnson spent the weekend in the countryside as he ________to the office on Saturday.
A. hasn't gone B. wasn't necessary to go C. didn't have to go D. needn't to go
34. ---Must I attend the meeting this evening, sir
----No, you ________. A might not B. won't C. don't have to
35. I _______go to the marketplace today .There are enough vegetables in the house.
A. mustn't B. haven't got to C. can't D. don't need
36. ---_______I go there at once
---No , I don't think you __________.
A. must…..have to B. Need ….need C. Do …need to D. May…ought to
37.It ______he that tells such a lie ;It ______be you .
A. mustn't be …must B. can't be …..must C. must not be …can D. can't be …can
38. He must have missed the train, _______ he
A. mustn't B. didn't C. needn't D. isn't
39. He must be in the reading-room, _______he
A. mustn't B. needn't C. doesn't D. isn't
40…Who _________it be that broke the glass
---It _________be John .He was drinking here a moment ago.
A. might…..might B. must ….must C. could …must D. could …ought to
41. ----Why is she still standing there
----She _________be waiting for her boyfriend.
A. can B. must C. need D. will
42. I didn't hear the phone .I_______ asleep.
A. must be B. can be C. may be D. must have been
43. It's certain that somebody stole her bike last night .
= Somebody _______her bike last night .
A. must steal B. must have stolen C. had to steal D. must have to steal
44. ---When did you first visit New York
-----I think it _________1978.
A . must be B. may be C. must have been D. ought to be
45. It's possible that she forgot her promise .
=She _______her promise .
A. may forget B . might forget C. may have forgotten D. must forget
46. It ________around 8 o'clock when I came back because it was already dark.
A. had to be B. must be C. must have been D. was to be
47. ---I rang your flat yesterday .A man answered ,but I didn't recognized the voice .
----Oh , it ________my uncle, Peter.
A. must be B. may be C. must have been D. might be
48. Mike is watching TV happily .He _____his homework .
A. must do B. may do C. can do D. must have finished
49. She speaks French well ; she _________France.
A. must be in B. must have gone to C. must have been to D. must have been in
50. ---Mr. Brown left for Shanghai at seven this morning .
--- No , he ________at seven .I saw him at half past six this morning .
A. mustn't have started B. can't have started C. must have started D. mustn't start
51. Everyone _________the cake because there wasn't a small piece left .
A. must like B. may like C. must have liked D. had liked
52. I'm very hungry .I _______find something to eat .
A have to B. would C. may D. can
53. I forgot to take an umbrella with me .That's why I ________wait until the rain stops.
A. should B. ought to C. must D. had to
54. The villagers _______fetch water from a dirty pond before liberation .
A. could B .must C. had to D. might
55. Since the electricity went off, we ________home.
A. must have done B. had to go C. might go D. had gone
56. ----Where were you this afternoon I tried to call you .
---- I _______to the library for a while.
A. must go B. should go C. had to go D. tried to go
57. You are his father .You _________take care of him.
A. might B. ought to C . are able to D. ought
58. There is a fine sunset .It ________to be a fine day tomorrow.
A. ought B. used C. has D. will have
59. ----Need I go to see her now
----Yes , you _________
----No , you_________.
A. need ….mustn't B. must …..mustn't C. must ….needn't D. need ….needn't
60. ---Would you like me to go to the hospital with you
----No, you _______with me .
A. mustn't go B. needn't go C. can't go D. don't need go
61. ----Must I write to her
-----No , you _______.
A. mustn't B. shouldn't C. can't D. don't have to
62. ---Need I start tonight
----Yes , you ___________.
A. do B. need C. must D. may
63 . We mustn't buy things we ________.
A. needn't B. need not C. don't need D. need not to
64. The question ____________discussing.
A. need B. needs C. can be D. must be
65. She _______go alone in the afternoon.
A. dares not B. daren't dared not to D. dares no
66.He _____even look out of the window.
A. daren't B. daresn't C. dared not to D. dares not
67. The little girl _________dance before so many guests ,_____she
A. doesn't dare to …dare B. daren't do ….does C. dares not …dare D. daren't …dare
68. That naughty ________go out alone at night .
A. dare not B. dare not to C. doesn't dare D. don't dare to
69. There was plenty of time .She ______________.
A. mustn't have hurried B. couldn't have hurried C. must not hurry D. needn't have hurried
70. That's all . It ___________ be talked about .
A. mightn't B. daren't to C. needn't to D. needn't
71. He _______the meeting ,so he stayed at home
A. needn't have attended B. didn't need to attend
B. C. didn't need attend D. needn't to have attended.
72.I _____that time is more valuable than money.
A. need hardly to say B. needn't hardly say C. hardly need say D. hardly need to say
73. If he dare do it again, he ______be punished.
A. ought to B . can C. shall D. was sure to
74. Professor Li, many students want to see you ________ they wait here or outside
A. Do B. Will C. Shall D. Can
75.As a soldier, you ________do as your captain told.
A. will B. shall C. may D. ought
76.A man who fears his wife once said, "My wife always says, 'You ________' and I always say, 'I_________'."
A. will…….shall B. will…..will C. shall…….shall D. shall…..will
77. You're thirsty ,aren't you _______he get you some coffee
A. Does B, Shall C. Would D. Let
78. You say you ________not do it, but I say you ________you do it.
A. will……shall B. shall…….shall C. shall……will D. will…..will
79. --_______we go out for a walk
--Great. Let's go.
A. Shall B. Will C. May D. Should
80.--I am sorry. I didn't catch you.
--___repeat the question
A. Shall I B. Will I C. Would you like to D. Would you rather me
81 .--____he post the letter at once, sir
--Yes, ___him to do it as soon as possible.
A. Will ….. get B. Shall…..get C. Must ……have D. Could….let
82.--Is Tom in the lab
--Yes, ____he come back at once
A. Shall B. Will C. Would D. May
83. --___ he open the door
--Yes, please.
A. Shall B. Will C. Can D. Would
84. The plant is dead. I ________it more water.
A .will give B. should have given C. must give D. may have given
85.Look! That fellow is too sleepy to work. He_____ up reading until midnight.
A. mustn't stay B. mustn't have stayed C. ought not to stay D. should have stayed
86. All the students _____do their best for the modernizations of our country.
A. can B. should C. may D. might E. are asked
87.His pale face suggests he _____seriously ill, and I suggest he _____to the hospital.
A. should be ….should be sent B. was…be sent C. is…be sent D. is…would be sent
88.Look! What you've done to me. You ______ more careful.
A . may be B. had to be C. should have been D. would be
89.You_____him. Why didn't you
A .ought to thank B. should thank C. ought to have thanked D. shouldn't have thanked
90.Susan, you are so lazy. This job _______ hours ago.
A. must have been finished B. should be finished
C. mustn't have been finished D. should have been finished
91. --I feel rather tired today.
--You _____to sleep too late last night.
A. must go B. might go C. couldn't have gone
D. shouldn't have gone E. ought to have gone
92.---I came alone instead of coming with Mary.
--- Well, you ______with Mary.
A. must have come B. need have come C. shouldn't have come D. should have come
93.I told him that he _____a letter to his parents, so he wrote it .
A. ought to write B. ought to have written C. should have written D. must have written
94. I'm sorry I ______to tell you I was coming.
A. ought to phone B. should phone C. need to phone D. ought to have phoned
95.---Will you please go to New York with me
---No, I _______.
A. wouldn't B. wouldn't like C. won't D. shouldn't
96. If he _____come to the party on my birthday , I will be very happy.
A. must B. would C. will D. ought
97. Every time he comes to see me ,he _______ me something good to eat.
A. ought bring B. may have brought C. need have brought D. will bring
98. They asked Tom to give Jack a drink, but he _______.
A. hadn't B. wasn't C. wouldn't D. shouldn't
99.I asked her if I _____close the window.
A. shall B. will C. would D. should
100---Would you like to see the film tonight
---Yes, I _____meet you at the gate of the Students' Centre.
A. would B. will C. must D. ought to
101.He promised he _____ not make such silly mistakes.
A. would B. should C. might D. could
102. -Let's order some chicken.
--Wouldn't you ____ have some fish instead
A. better B. rather C. like D. seem
103. The old man ______go to the park to feed the birds, where there is no bird at all.
A. should B. would C. ought to D. need
104. When I was in Shanghai , she ____ me about the great changes there.
A. will tell B. would tell C. has told D. should tell
105. The old man _____sit for hours watching the ships.
A. would B. should C. was used to D. would rather to
106 . John has been sick for a long time, so he _____ pain.
A. used to B. got used to C. become used to D. is used to
107. People _________that the sun went around the earth .
A. were used to think B. used to think C. are used to thinking D. got used to think
108. Of three people who travel together , there _______someone who ________my teacher.
A. must have ….might B. must be ….can C. may be …..could D. may have ….may
109. Some of the actresses who _________didn't come.
A. should appear B. may turn up C. must be present D. ought to have appeared
110. ----I thought you wouldn't mind .
-----Well ,as a matter of fact I _________, but you ________me first.]
A. didn't ….have asked B. don't …..have asked C. didn't ….ask D. don't ask
111.Oliver ought not to _________me about it , but he_________.
A. have told……does B. be telling….did C. have told …….did D. be telling ….does
112. ---Tom graduated from college at a very young age.
-----He _________have been an excellent student .
A. must B. should C. would D. could
113. Bob ________hard, otherwise he _________this term.
A. couldn't have worked ……wouldn't have failed B. can't work …..wouldn't have failed
B. mustn't have worked ….wouldn't fail D. must have worked …..would fail
114. ---Why didn't you answer the phone last night
----I _________when you called .
A. have to be sleeping B. must have been sleeping C. must have slept D. was sleeping
115. ----Need I do the repairs now
-----Yes , you ________but you ________ask someone to help you.
A. need …….need B. must …..can C. need……can D. must …….need
116. ----Can you answer my question
----__________.
A. No ,you can't B. Sorry ,I can C. What's it D. Let me try
117. The naughty boy stood by the door ,________say anything.
A. dare not B. daring not C. dare not to D. not daring to
118. ---What shall I tell them, Mr. Lover
----You ________that I'll see the film now.
A. had better tell B. had better say C. would rather say D. would rather tell E. would like to say
119. ---What do you think of the service here
-----Oh, wonderful! We _________ a better place.
A. couldn't have found B. won't find C. mustn't have found D. oughtn't have found
120. ---Is tom in the lab
----Yes ,______he come back at once
A. Will B. Should C. May D. Shall
121.--- You missed a good chance .
----Yes ,I _______that job when it was offered.
A. should take B. should have taken C. shall take D. would have taken
122. ----Shall _________go out and play today
----Sorry, too much homework .I won't go until ________.
A. I…..we do B. we…I do C. I ….it will be done D. we ….it is done
123. ----I can hardly open my eyes now .How about you
----Exactly, _________have stayed up the whole night .
A. you shouldn't B. you must C. we shouldn't D. we must
124. ----You are late, aren't you
-----Yes, I _________here earlier, but my bike broke down on the way.
A. must have got B. should get C. ought to have got D. might get
125. Bill is only 9 months and he _______already stand up .
A. must B. can C. may D. will
126. ---The fish is gone!
----________eaten it
A. Should our cat have B. Can our cat has C. Must our cat have D. May our cat have E. Might our cat have
127. ----_____ your aunt and uncle come to your birthday party
-----Yes, they _________be here on time ,I'm sure.
A. Will ….can B. Can …can C. Can must D. Must….must
128. ----Can he have left his book in the room
-----________.
A. Yes, he can B. No he may not C. Yes he can't D. Yes ,he did
129. Mr. White _______my invitation, otherwise he might have arrived here now.
A. can't receive B. can't have received C. mustn't receive D. mustn't have received
130. I thought he ________at home, so I drove over to pay a visit to him.
A. might be might have been B. may have been C. can D. be might be
131. ---Did you walk home by yourself last night
----Yes , I did .But I guess I ________.
A. shouldn't B. shouldn't have C. mustn't have D. may not have
132.----She is two hours late .
-----What _______have happened to her
A. can B. ought to C. must C. can D .would