(could), may (might), must, have to, shall (should, will (would), dare (dared), need (needed), ought to等。情态动词无人称和数的变化；不能单独使用，必须与其后的动词原形构成谓语
一、can, could
1) 表示能力（体力、知识、技能）。Can you lift this heavy box?（体力）
Mary can speak three languages.（知识）Can you skate?（技能）
此时可用be able to代替。Can只有一般现在时和一般过去式；而be able to则有更多的时态。I‘ll not be able to come this afternoon.
当表示―经过努力才得以做成功某事‖时应用be able to，不能用Can。如：
He was able to go to the party yesterday evening in spite of the heavy rain.
2) 表示请求和允许。
-----Can I go now? ----- Yes, you can. / No, you can‘t. 此时可与may互换。在疑问句中还可用could, might代替，不是过去式，只是语气更委婉，不能用于肯定句和答语中。
---- Could I come to see you tomorrow? ---- Yes, you can. ( No, I‘m afraid not. )
3) 表示客观可能性（客观原因形成的能力）。
They‘ve changed the timetable, so we can go by bus instead. This hall can hold 500 people at least.
4) 表示推测（惊讶、怀疑、不相信的态度），用于疑问句、否定句和感叹句中。
Can this be true? This can‘t be done by him. How can this be true?
二、may, might
1) 表示请求和允许。might比may语气更委婉，而不是过去式。否定回答时可用can‘t
或mustn‘t，表示―不可以，禁止‖。---Might/ May I smoke in this room?
---- No, you mustn‘t. --- May/Might I take this book out of the room?
---- Yes, you can. (No, you can‘t / mustn‘t. ) 用May I...？征徇对方许可时比较正式和客气，而用Can I...？在口语中更常见。
2）用于祈使句，表示祝愿。May you succeed!
3) 表示推测、可能性（不用于疑问句）。might不是过去式，它所表示的可能性比may小。1．He may /might be very busy now. 2．Your mother may /might not know the truth.
三、must, have to 1) 表示必须、必要。You must come in time.
在回答引出的问句时，如果是否定的，不能用mustn‘t（禁止，不准），而用needn‘t, don‘t have to（不必）. ---- Must we hand in our exercise books today? ---- Yes, you must.
---- No, you don‘t have to / you needn‘t.
2) must是说话人的主观看法，而have to则强调客观需要。Must只有一般现在时，have to 有更多的时态形式。1．he play isn‘t interesting, I really must go now. 2．I had to work when
I was your age.
3) 表示推测、可能性（只用于肯定的陈述句）
1．You‘re Tom‘s good friend, so you must know what he likes best.
2．Your mother must be waiting for you now.
四、dare, need
1) dare作情态动词用时, 常用于疑问句、否定句和条件从句中, 过去式形式为dared。1．How dare you say I‘m unfair? 2．He daren‘t speak English before such a crowd, dare he? 3．If we dared not go there that day，we couldn‘t get the beautiful flowers.
2) need 作情态动词用时, 常用于疑问句、否定句。在肯定句中一般用must, have to, ought to, should代替。1．You needn‘t come so early. 2. ---- Need I finish the work today?
---- Yes, you must. / No, you needn‘t.
3) dare和need作实义动词用时，有人称、时态和数的变化。在肯定句中，dare后面常接带to的不定式。在疑问句和否定句中，dare后面可接带to或不带to的不定式。而need后面只能接带to的不定式。
1. I dare to swim across this river.
2. He doesn‘t dare (to) answer.
3. He needs to finish his homework today.
五、shall, should
1) shall 用于第一人称，征求对方的意见。What shall we do this evening?
2) shall 用于第二、三人称，表示说话人给对方的命令、警告、允诺或威胁。
1. You shall fail if you don‘t work hard.(警告)
2. He shall have the book when I finish it.(允诺)
3. He shall be punished.(威胁)
六、will, would
1) 表示请求、建议等，would更委婉。Will / Would you pass me the ball, please?
2) 表示意志、愿望和决心。1. I will never do that again. 2. They asked him if he would go abroad.
3) would表示过去反复发生的动作或某种倾向。would表示过去习惯时比used to正式，且有―现已无此习惯‖的含义。1. During the vacation, he would visit me every other day. 2. The wound would not heal.
4) 表示估计和猜想。It would be about ten o‘clock when she left home.
七、should, ought to 1) should, ought to表示―应该‖，ought to表示义务或责任，比should语气重。1. I should help her because she is in trouble. 2. You ought to take care of the baby.
2) 表示劝告、建议和命令。should, ought to可通用，但在疑问句中常用should。
1. You should / ought to go to class right away.
2. Should I open the window?
3) 表示推测
should , ought to (客观推测), must(主观推测)。1.He must be home by now. (断定他已到家) 2.He ought to/should be home by now.(不太肯定) 3. This is where the oil must be.(直爽)
4. This is where the oil ought to/should be.(含蓄)
情态动词can 表示能力，意为―能会‖
表示推测，意为―可能‖，常用于否定句和疑问句中
表示请求，允许，意为―可以‖
could can 的过去式，意为―能、会‖，表示过去的能力
在疑问句中表示委婉请求
may 表示请求、许可，意为―可以‖
表示推测，常用于肯定句中，意为―可能、也许‖
might may的过去式
表示推测，常用于肯定句中，意为― 可能、也许‖
must 表示主观看法，意为―必须、应该‖
表示有把握的推测，用语肯定句
Need 表示需要、必须，主要用于否定句和疑问句中
dare 表示敢于，主要用于否定句和疑问句中
should 意为― 应该‖，表示要求和命令
表示劝告、建议
had better 意为―最好‖，表示建议
used to 意为―过去常常，表示过去的动作、行为
考点知识清单
知识梳理
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，另外情态动词没哟人称和数的变化，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）表示可能、能够。如：
I can finish it in an hour. 我能在一小时后完成它。
（3）表示许可，常在口语中。如：
You can use my dictionary. 你可以用我的字典。
（4）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--- I think Miss Gao must be in the library. She said she would go there.
----- No. She __ be there, I have just been there.
A.can‘t
B.mustn‘t
C.needn‘t
D.wouldn‘t
[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] A
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 a favour? 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。
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----_______ 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.
(3) may的过去式为might ，表示推测时。可能性低于may 。如：
He is away from school. He might be sick.
他离开学校了，可能是他生病了。
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) 其否定形式mustn‘t表示― 一定不要‖ ―千万别‖ ―禁止, 不许‖. 如：
You mustn‘t play with fire.你不许玩火。
You mustn‘t be late. 你一定不要迟到。
（3）对must引导的疑问句，肯定回答为must，否定回答为needn‘t或don‘t have to .
如：
---Must I finish my homework?
我现在必须完成作业吗？
---No, you needn‘t.
不，你不必。
(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 hav e finished writing, hasn‘t she?
她一定已经写完了，不是吗？
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，其否定形式为needn‘t，意为―没有必要，不必‖。用need 提问时，肯定回答为must，否定回答为needn‘t 。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 . 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，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。
6. dare 的用法
dare意为―敢、敢于‖, 用法近似于need，有两种词性：
（1）dare 作为情态动词，多用于否定句、疑问句或条件句中，无第三人称单数形式，只有一般现在时和一般过去时。如：
Dare he tell them what he knows?
他敢告诉他们所知道的情况吗？
I daren‘t ask her – will you do it for me?
我可不敢问她，你能帮我问问吗？
（2）dare 作为实义动词，此时有人称、数及时态的变化。如：
He doesn‘t dare to break his promise.
他不敢食言。
注意：在口语中，dare 的各种形式常与不带to 的不定式连用。如：
Do you dare tell her what I said?
你敢告诉她我说的话吗？
I didn‘t dare look at him.
我不敢看他。
7. shall 的用法
（1）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？
(2) 表示决心、警告、命令（多用于第二、三人称），如：
No one shall bring your beepers or mobile phones in the exam.
考试中任何人不准带BP机和手机。
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 (would)like to do sth. 表示―想要、愿意做某事‖，常用于口语中。如：
I should (would) like to go with you . 我愿意和你一起去。
Would you like to go with me? 你想和我一起去吗？
（3）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。
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
1. 由can、may、must构成的疑问句
（1）句式：Can/ May/ Must…+ 主语+动词原形+….？如：
Can you repair the car? 你会修小汽车吗？
Could he be a good student? 他能是名好学生吗？
May I borrow your ruler? 我可以借你的尺子吗？
Must we clean the room now?我们必须现在打扫房间吗？
（2）对may 引出的问句，可以有下列回答方式：
Yes, of course.
Yes, certainly.
Sure .
No, you mustn‘t.
No, you can‘t.
（3）对must引出的疑问句，回答方式为：
Yes, …must.
No,… needn‘t/ don‘t have to.
2. will，would，shall 的用法
（1）will 在一般疑问句中表示客气的―请求、劝说‖。would 是will 的过去式，语气更加客气、委婉。如：
Would you show me your picture book? 你能让我看看你的画册吗？
Will you please give me a call? 请给我打个电话好吗？
（2）对will/ 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.
Certainly. (No, thank you .)
Yes, please.
例---Would you do me a favour and pass on my thanks to Lily?
-----________.
A.That‘s right
B.With pleasure
C.It doesn‘t matter
D.No trouble
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
（3）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。如：我给你把门打开好吗？
我们现在开始好吗？
其回答方式有以下几种：
Yes, please.
All right.
No, thank you.
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 mustn‘t. / can‘t.不，你不能。
（4）can‘t 还可用于固定习语中。如：
She can‘t help crying. 她不禁大哭起来。
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。
3. （1）mustn‘t 表示不许，不可。如：
He mustn‘t leave his room. 他不许离开他的房间。
You mustn‘t talk in class. 你们不可以在课上说话。
(2) mustn‘t也可用于以may 表示要求时的否定回答中。如：
——May I stand here? 我可以站在这里吗？
------No, you mustn‘t(can‘t).
不，不行。
4. （1）needn‘t 意为― 不必‖ 。如：
You needn‘t meet him unless you‘d like to.
你不需要见他，除非你愿意。
（2）needn‘t + have+ 动词的过去分词，表不需要完成但已完成的动作，暗含时间或精力上的浪费。如：
You needn‘t have bought it. 你没必要买它（但你却买了）。
5. shouldn‘t 表示不应该。如：
You shouldn‘t feel so unhappy over such little things.
对于这种小事，你不应该感到这么不高兴。
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。如：
You needn‘t get up so early every day.
你不必每天都起这么早。
She shouldn‘t speak t 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。
易混知识清单
知识归纳
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某事。如：
Jim can‘t speak English. 吉姆不会说英语。
He could speak English at 5. 他五岁时就会说英语。
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
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）不可能，如：
那个人不可能是咱们老师，他年轻得多。
The man can‘t be our teacher because he is much younger than our teacher..
2. mustn‘t 意为― 禁止、不许‖，用来表达命令，表示强烈的语气。如：
You mustn‘t play football in the street. It‘s too dangerous.
你不可以在街上踢足球，太危险了。
易混点五must 和have to
1.must 侧重于个人意志和主观上的必要，还可以在间接引语中表示过去的必要或业务。
2. 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。
易混点六need，dare 的两种用法
3. need ，dare 作情态动词是，多用于否定句、疑问句中，后接动词原形。如：
You needn‘t explain it to me . 你不必向我解释这件事。
Dare you say that again? 你敢再说一遍吗？
3. 在肯定句中，它们后边多接动词不定式，此时为实义动词。如：
Tom needs to fetch the bool for me .
汤姆需要给我取回那本书。
Mary dared to go across the street by herself. 玛丽敢自己过马路。
易混点七used to do / be used to doing / be used to do…
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。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 wasn‘t used to eating in a r estaurant.他不习惯在饭店吃饭。
Knives are used to cut things.刀是被用来切东西的。（被动语态）
方法技巧清单
方法技巧
方法一了解命题规律
测试内容出现频率较高的情态动词主要集中在can，may，must，need 等次的用法上，重点为以下四点:
1.can ，could 表能力的用法。
2. 常见情态动词的提问和回答，尤其是May I …？No，you mustn‘t/ can‘t. Must
I …?
No, you needn‘t/
3. 表示推测的用法，肯定句中用may （可能），must （一定），否定句中用may not（可能不），can‘t（不可能）。注意can‘t 与mustn‘t 的区别。
4. 情态动词的被动语态。
方法二掌握突破方法
1. 从整体上把握情态动词的基本用法。
例—________ you pass me a pen? I‘d like to write down the phone numb er. —Sure. Here it is.
A. Can
B. Need
C. Might
D. Must
【解析】由题干可知，本句表示请求、许可。
【答案】A
2. 逐个学习，了解每个情态动词的用法特征。
例—May I go to the cinema, mum? —Certainly, but you ________ be back by 11 o‘clock.
A. can
B. may
C. must
D. need
[解析] 由题意可知，此处并非表推测的用法，而是妈妈对孩子提出的要求，故选C, 意为― 必须‖。
[答案] C
3. 认真区别具有相同功能的、意思相近的情态动词的用法。
例You ______ get there by bus.
A. don‘t need
B. needn‘t to
C. don‘t need to
D. need don‘t to
【解析】由选项A 可知need 为实义动词，故应加上to 才正确。选项 B needn‘t 为情态动词，应去掉to，故选C.
答案C
4. 解答情态动词的题目时，一定要细心领会情景特征，不要放过任何细节，只有这样才能找到足够的信息，确定最佳答案。
例You _______ worry about me. It‘s nothing serious.
A. can‘t
B. mustn‘t
C. needn‘t
D. won‘t
【解析】由题干It‘s nothing serious 可推断，第一句意为―你不必为我担心‖，故选C。本题易错选B, mustn‘t 意为―禁止‖，故不正确。
答案 C
易错题型清单错题透视错因一语境理解错误例—Excuse me. Is this the right way to the Summer Please? —Sorry, I‘m not sure . But it _______ be.
[分析] 考查情态动词might 表推测的用法。―I‘m not sure‖ 说明说话者的语气并不肯定，所以要用might。
答案A【错因透视】情态动词表示推测时，肯定句中用might ，may，must，其肯定程度递增。
错因二否定形式混淆
例The man in the office___be Mr. Black because he went home just now.
A.mustn‘t
B.may not
C.can‘t
D.needn‘t
【分析】由下文he went home just now 可知，作者判断办公室里那个人（不可能是Mr. Black 。mustn‘t 意为―千万别‖，may not 意为―可能不‖，needn‘t意为―不必‖。
can‘t 意为不可能，故选C。
答案C
【错因透视】情态动词的否定式含义不同，要牢记每个否定式的不同含义。
错因三相似词语混淆
例---Can you go surfing with us this afternoon?
----I‘d like to , but I __ look after my sister at home , because my mother is ill.
A.need
B.must
C.have to
D.should
【分析】由题干my mother is ill 为客观要求可知，选C.
答案 C
[错因透视] 相似词组must 表示主观愿望，have to 则为客观要求。学生由于不清楚这一点而误选B项。
错因四疑问答语易错解
例----May I take this book out of the reading room?
------______. Please read it here.
A. Certainly
B.No, you needn‘t
C.No, you mustn‘t
D.No, you may not
【分析】May I …? 的否定答语为No, you can‘t/ mustn‘t. ; Must I …?否定答语为No，you needn‘t/don‘t have to.;Can I …? 的否定答语为No，you can‘t.在口语交际中，要体会句子中的情感差别。
【答案】C
【错因透视】学生由于看到问句中用的情态动词may 而误选D项。应该注意在有问话与答语的上下文中，下文不一定要填上文出现的情态动词，而要注意情感的细微变化。
情态动词练习(1)
1．May I stop my car here? No, you_＿＿＿.
A. can't
B. mustn't
C. needn't
D. don't have to
2. Must we clean the house now? No, you _______.
A. needn't
B. may not
C. mustn't
D. can't
3. John his father about his failure in the exam.
A. dares not tell
B. dares not telling
C. dare not tell
D. dares not to tell
4. You return the book now. You can keep it next week if you like.
A. can't
B. mustn't
C. needn't
D. may not
5. 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
6. The fire spread through the hotel very quickly but everyone get out.
A. had to
B. would
C. could
D. was able to
7. Would you go out for a walk with me?
No, I . My girl friend is coming.
A. wouldn't
B. shall not
C. won't
D. shouldn't
8. Man die without water. A. will B. can C. need D. shall
9. If he started at 9 0'clock, he be there by now.
A. need
B. shall
C. ought to
D. must
10. I mailed the letter two weeks ago. She_____it.
A. must receive
B. can't receive
C. might receive
D. must have received
11.The professor gave orders that the experiment before 5:30p.m.
A. be finished
B. will finish
C. must be finished
D. would be finished
12. There was plenty of time. You_____.
A. mustn't hurry
B. mustn't have hurried
C. needn't hurry
D. needn't have hurried
13. Tom was a diligent boy. He go to school though it was raining hard. was able to B. could C. couldn't D. wasn't able to
14. ______I go back before lunch? No, I don't think you________.
A. Need...must
B. Do...need to
C. Must...have to
D. May .... ought to
15. The teacher do all the exercises, but a pupil_______.
A. needn't....must
B. may not...must
C. needn't....needn't
D. can't....must
16. Would you open the window please ? Yes, I______.
A. will
B. would
C. do
D. can
17. A lion only attacks a human being when it is hungry.
A. should
B. can
C. will
D. shall
18. ____Must I finish this novel this morning ?
____No, you_____.
A. mustn't
B. might not
C. don't have to
D. can't
19. The taxi ____ only hold six passengers. It is full. You take the next one.
A. may...may
B. can...may
C. may...can
D. must...can
20. I a little earlier, but I met a friend of mine on the way.
A. may come
B. may have come
C. could have come
D. must have come
21. I wish to go home now, I?
A. may
B. can't
C. must
D. do
22. He must have finished his homework, he?
A. mustn't
B. didn't
C. needn't
D. hasn't
23. This pen looks like mine, yet it isn't. Whose it be?
A. must
B. can
C. may
D. might
24. He didn't do well in the exam. He hard at his lessons.
A. must have worked
B. ought to have worked
C. would have worked
D. has worked
25. I wonder how he that to the teacher.
A. dare to say
B. dare saying
C. not dare say
D. dared say
26. Mr Baker, a number of students want to see you. _____ they wait here or outside?
A. Should
B. Will
C. Shall
D. Are
27. You the trees. Look, it is raining now.
A. mustn't have watered
B. needn't have watered
C. could have watered
D. might have watered
28. I give you an answer tomorrow. I promise!
A. must
B. will
C. may
D. shall
29. As a soldier, you do as the head tells you.
A. will
B. shall
C. may
D. ought
30. The streets are all dry. It_____ during the night.
A. can't have rained
B. must have rained
C. couldn't rain
D. shouldn't have rained
31. "When _____ he leave the hospital?" I asked the doctor.
A. will
B. shall
C. can
D. may
32. They have not finish the work up to now.
____Well, they ______
A. should have
B. should
C. ought to
D. ought have
33. Since it is already midnight, we______.
A. had better leaving
B. ought to have leave
C. should take our leave
D. might as well leave
34. you be happy!
A. May
B. Can
C. Must
D. Would
35. Must we come tomorrow?
A. No, you can't
B. No, you needn't
C. No, you mustn't
D. No, you may not
36. You miss the lesson, though we have it on Thursday.
A. mustn't...needn't
B. needn't....mustn't
C. mustn't...mustn't
D. needn't...needn't
37. To succeed in a difficult task,_____.
A. one needs to work hard
B. to work hard is needed
C. you need be a hard working person
D. to work hard is what one needs
38. In case I______, I would try again.
A. will fail
B. would miss
C. should fail
D. shall miss
39. Some people feel that handguns______.
A. should control
B. should be controlled
C. must be controlling
D. can be control
40. ______ open the door for you ?
A. Would you like that I
B. Do you want that I
C. Will I
D. Shall I
41. My son ____ the examination, but he wasn't careful enough.
A. might be able to pass
B. must have passed
C. could have passed
D. were able to pass
42. Isn't it strange that the lazy boy pass the exam?
A. should
B. has
C. might
D. would
43. We the work so early without your help.
A. couldn't finish
B. can't finish
C. couldn't have finished
D. can't have finished
44. We the manager, but no one _____ his telephone number.
A. could have called, knew
B. could have called, had known
C. could call, had known
D. could call, knew
45. "Would you come and join them?"
"I wish I . But I am busy at this moment.
A. can't
B. couldn't
C. could
D. can
46. If Alice this afternoon, the meeting should be put off.
A. would not come
B. might not come
C. should not come
D. could not come
47. 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
48. 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
49. I thought you like something to read, so I have brought you some books.
A. may
B. might
C. could
D. must
50. 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
51. It's still early, you______.
A. mustn't hurry
B. wouldn't hurry
C. may not hurry
D. don't have to hurry
52. Please open the window,________?
A. can't you
B. aren't you
C. do you
D. will you
53. 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
54. May I stop here?
No, you ____.
A. mustn't
B. might not
C. needn't
D. won't
55. He _____ you more help, even though he was very busy.
A. might have given
B. might give
C. may have given
D. may give
56. 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
57. Could I borrow your dictionary? Yes, of course you______.
A. might
B. will
C. can
D. should
58. 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
59. The young man has made so much noise that he not have been allowed t o attend the
concert.
A. could
B. must
C. would
D. should
60. One ought for what one has done.
A. not to be punished
B. to not be punished
C. to not punished
D. not be punished
61. If you really want yourself to be in good health, you must always so muc
h..
A. not, be smoking
B. not, have smoked
C. not, to smoke
D. be not, smoking
62. Where is Mary?
She isn't here. I think she_____.
A. may have gone home
B. must have gone home
C. might have gone home
D. All the above
63. 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. dared not
64. She is already two hours late. What to her?
A. can have happened
B. may have happened
C. should have happened
D. must happen
65. ― 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. Can, can, mustn't
D. May, must, needn't
66. You must be a writer, ______?
A. mustn't you
B. are you
C. must you
D. aren't you
67. You must have seen him last night, ?
A. haven't you
B. didn't you
C. don't you
D. must you
68. I got up early this morning, but I _______so because I had no work to d o.
A. mustn't have done
B. didn't need to do
C. needn't have done
D. can't have done
69. Let's say that you could go there again, how feel?
A. will you
B. should you
C. would you
D. do you
70. I daren't tell you what he did for fear that he angry with.
A. will be
B. is
C. was
D. should be
71. Without the leadership of the Party, there no New China.
A. would be
B. has been
C. was
D. should be
72. It is necessary that we a foreign language.
A. must master
B. ought to master
C. master
D. should master
73. 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
74. I am surprised that he to help me when I needed it most.
A. should refuse
B. would have refused
C. should have refused to
D. may ha ve refused
75. Look! Tom is too sleepy to work .He __ up watching TV.
A. mustn't have stayed
B. shouldn't have stayed
C. mustn't stay
D. ought not t o say.
练习题答案
1－10BACCB DCADD 11－20ADACA ACCBC 21－30 ADBBD CBBBA 31－40BADAB AACBD 41－50CACAC CDDBD 51－60DDBAA DCBDA
61－70ADCAB DBCCB 71－75ADDCB
【英语】情态动词详解+例句 一、单项选择情态动词 1．—Where is my dictionary?I remember I put it here yesterday. —You___it in the wrong place. A．must put B．should have put C．might put D．might have put 【答案】D 【解析】 【详解】 考查情态动词。句意：——我的词典在哪里？我记得昨天放在这里了。——你或许放错了地方。“might have +动词+ed形式”表示过去可能完成的动作。根据所提供的情景Where is my dictionary? I remember I put it here yesterday.可判断出把词典放在某个地方发生在过去，所以要用“might have +动词+ed形式”。“should have + 动词+ed形式”表示“(过去)本来应该做某事”。must意为“一定”，是肯定的推测，与所提供的情景的矛盾。might put表示现在发生的事。故选D。 2．—I have something important to tell Jo hn. But I can’t find him. —His cell phone is here, so he ________ have gone too far. A．mustn’t B．needn’t C．wouldn’t D．can’t 【答案】D 【解析】 【详解】 考查情态动词。句意：——我有重要的事情要告诉John，但是我找不到他。——他的手机在这儿，所以他不可能走得太远。根据句意可知，此处是对过去的一种猜测，此处是表达不可能……，用can’t have done。故选D。 3．The room is so clean. He ________ have cleaned it yesterday evening. A．will B．need C．can D．must 【答案】D 【解析】 【详解】 考查情态动词表推测。句意：房间如此干净，他一定是昨天晚上打扫过了。must have done 表示对过去发生的事情有把握的猜测，意思是“一定（做过）”，故D项正确。 4．One of our rules is that every student _______ wear school uniform while at school. A．might B．could
情态动词练习题带答案 一、单项选择情态动词 1．—I feel a little nervous. —Take it easy. You __________ have difficulty passing the exam when you have prepared for it well. A．mustn’t B．needn’t C．may not D．shouldn’t 【答案】D 【解析】 【详解】 考查情态动词。句意：——我觉得有点紧张。——不要着急。当你准备充分时，通过考试应该不会有困难。A. mustn’t禁止，不允许；B. needn’t不必；C. may not可能不会；D. shouldn’t不应该。结合句意可知答案为D。 2．—I have something important to tell John. But I can’t find him. —His cell phone is here, so he ________ have gone too far. A．mustn’t B．needn’t C．wouldn’t D．can’t 【答案】D 【解析】 【详解】 考查情态动词。句意：——我有重要的事情要告诉John，但是我找不到他。——他的手机在这儿，所以他不可能走得太远。根据句意可知，此处是对过去的一种猜测，此处是表达不可能……，用can’t have done。故选D。 3．It has been announced that all the candidates ___________ remain in their seats until all the papers have been collected. A．shall B．could C．would D．ought 【答案】A 【解析】 【详解】 考查情态动词用法。句意：据宣布，所有的候选人都要坐在位置上，直到所有的试卷都被收齐。根据句意可知本句是考试规则，情态动词shall可以表示“按照规则/规定/法律要做的事情”，符合本句语境。故A项正确。 4．—It’s really great to have a computer to store my photos. —Don’t count on it too much. It ________ break down and you’d better mak e a copy of them. A．must B．can C．should D．will
初中英语情态动词专项练习题 情态动词:can could may might will would must have to need had better should 情态动词特点 1.情态动词没有人称和数的变化. 2.情态动词后必须跟动词原形。 考点一：can，could, may，must 等情态动词的用法： 1. can 的用法： （1）.表示能力,译为“能、会”，即有种能力，尤其是生来具备的能力。 She can swim fa st, 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。 You can use my dictionary. 你可以用我的字典。 （3）.表示推测，条件: 常用于否定句和疑问句中，此时can’t 译为“ 不可能”。 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. A.can’t B.mustn’t C.needn’t D.wouldn’t 【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] A 2. could的用法： （1）.can的过去式，意为“ 能、会”，表示过去的能力。 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。 Could you do me a favour? 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,用could提问,必须用can来回答） 3. may的用法： （1）.表示请求、许可，比can 正式 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. tA. 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
高考情态动词专项练习及答案详解 一、单项选择情态动词 1．We ________ take clean drinking water for granted. One day we may run out of it. A．needn't B．can't C．won't D．shouldn't 【答案】D 【解析】 【详解】 考查情态动词。句意：我们不应该把拥有洁净的饮用水看作是理所当然的。也许有一天，我们会用完它。shouldn't“不应该”，符合句意。needn't不必；can't不可能；won't将不。故选D。 2．Using AI， many companies are now conducting experiments that__________ possible just a few years ago． A．would have been B．might have been C．shouldn't have been D．couldn't have been 【答案】D 【解析】 【详解】 考查情态动词表推测。句意：很多公司现在使用人工智能进行试验，这在几年前是不可能的。根据“a few years ago”可知，此处表示“过去不可能”，应该用couldn’t have done，故D 项正确。 3．Mr. Baker, some students want to see you. ______ they wait here or outside? A．May B．Should C．Shall D．Will 【答案】C 【解析】 【详解】 考查Shall的用法。句意：贝克先生，有些学生想见你。他们是在这里等还是在外面 等?Shall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。故选C。 【点睛】 Shall的用法 Shall作为助动词，一般用于第一人称Ⅰ和We，表示一个将来的动作，构成将来时态。Shall后面接动词原形。例如： （1）I shall think it over and Let you know my idea.我将考虑一下此事，然后告诉你我的想法。 （2）We shall have a good time in the park.我们在公园里会玩得很高兴的。常考的特殊用法
人教版英语英语情态动词专项练习经典含答案 一、初中英语情态动词 1．—Must I clean the classroom now? —No, you_______. A. mustn't B. can't C. needn't 【答案】 C 【解析】【分析】句意：--我必须现在把教室打扫干净吗？--不，你不必。must I do …?的否定回答是No, you needn't 或者 No , you don't have to 。根据是否定回答，故选C。 2．—Where is Monica? I can't find her anywhere. —She be in the library. She loves reading books when she is free. A. must B. need C. can't 【答案】 A 【解析】【分析】句意：——莫妮卡在哪？我到处都找不到她。——她肯定在图书馆，她喜欢空闲时看书。A肯定，肯定句中表示推测，B需要，C不可能，否定句中表示推测，根据 She loves reading books when she is free ，可知是肯定句表示推测，故选A。 【点评】考查情态动词，注意情态动词表推测的用法。 3．Please don't make so much noise. I ________ hear the speaker very well. A. needn't B. can't C. shouldn't D. mustn't 【答案】 B 【解析】【分析】句意：请不要发出那么多噪音。我不能很好地听清楚发言者的话。needn't不必；can't不能；shouldn't不应该；mustn't禁止。根据前半句的Please don't make so much noise.可知别人发出了太多噪音，所以他无法听见演讲者的话，故用情态动词can't。故选B。 【点评】考查情态动词，结合句意和词义做出判断。 4．A hard-working man ______ become a great scientist, but a great scientist _______ be a hard-working man. A. can't; can B. may not; must C. can't; must D. may not; can 【答案】 B 【解析】【分析】句意：一个勤奋的人可能不会成为一位伟大的科学家，但是一位伟大的科学家一定是一个勤奋的人。can't不可能，不会；can可能，能，会；may not 可能不；must 必须，一定；结合句意，可知，第一个空为“可能不”，第二个空为“一定”，故答案为B。
情态动词Can 专项练习 （基础题）用can 填空 1. He__ ___run . 6.She___ __dive. 2. He__ ___jump. 7.She__ ___fly. 3. He__ ___sing. 8.She___ __paint. 4. He__ ___write. 9.She___ __dance. 5. He__ ___read. 10.She_ ___ c ook. 11.I___ _run . 12.My mother ____ dive. 13.His sister ______________ j ump. 14.Sam ___ fly. 15.Supergirl ______________ s ing. 16.Kitty ___ paint. 17.He_ _ ___write. 18.Our teacher ____ dance. 19.It__ _ __read. 20.Tom___ __cook. 二．选择题 1. ___________ Can you a model ship for him? A.makes B.make C.making 2. —Can you ___ and answer my questions? --Yes,sir. A.stand up. B.stand down. C sit down. 3. ___________ Can you English? A.say B. speak C .tell 4. —How can you ___ ? ---I can go by bus. A.go there B.go to there C. get bus 6. Can you ___ me the way to Jack ' s house? A.know B.show C.say 7. Nancy can ___ cakes for her sister. A.makes B. making C.make 8. You can ___ bus No.6 at the next stop. A. take B.go C.by
初中英语情态动词用法详解 【情态动词知识梳理】 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。 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。 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‖。 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. A. can’t B. mustn’t C. needn’t D .wouldn’t 【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] A 2. could的用法： （1）.can的过去式，意为―能、会‖，表示过去的能力。 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。 Could you do me a favor? 你能帮我个忙吗？ —Could I use your pen? 我能用一下你的钢笔吗?
Modal Verbs 情态动词有can (could), may (might), must (must), have to, shall (should), will (would), need (need), dare (dared), ought to 等。情态动词无人称和数的变化。它不能单独使用，必须跟其后的动词原形构成谓语。情态动词的具体用法如下： 一、can, could 1、表示能力。 a. Can you speak English? b. Can you finish this work tonight? c. Man cannot live without air. Note:
(1) can表示能力时，可用be able to 代替。 a. I’ll not be able to come this afternoon. (2) 当我们要表示“某件事情已经 成功”时，应用was/ were able to , 不能用could a. He saw well and he was able to swim to the river when the flood happened. b. He was able to go to the party yesterday evening and he enjoyed himself very much. 2、表示客观可能性
a. People who live near airports can have their hearing harmed. b. The boy can sometimes be very naughty. （表示某人或某物一时的情况，“有时会。。。”） c. The invention can be improve d. d. Even experts can make mistakes. e. He can’t be in Beijing now because I saw him a moment ago. f. He had a lot of work to do last night, so he couldn’t have gone to see a film. Note: 在肯定句中用can表示可能性时，其含义是理论上的可能性，不表示
精选练习情态动词 ． 1．You________read that article if you don’t want to A．haven’t B．can’t C. mustn’t D．needn’ｔ2．I_______get this done immediately or it will be too late． A. must B．can C．may D．might 3．The house is dark；the Browns_________ to bed． A．may go B．should go C．should have gone D. must have gone 4．“That car must have cost a 1ot of money.” “Oh，no，_____.” A．it mustn’t B．it hasn’ｔ C．it doesn’t D．it didn’ｔ 5. I _______asleep in the corner，for 1 remember nothing of what happened during the night． A．might fall B. must fall C．must have fallen D. can have fallen 6．I’m feeling sick．I_________so much chocolate． A．needn’t have eaten B. couldn’t have eaten C．mustn’t have eaten D．shouldn’t have eaten 7. My wallet is nowhere to be found．I________when 1 was on the bus． A．must have dropped it B．must drop it C. should have dropped it D．ought to have dropped it 8．Mr．Green________my letter，otherwise he would have replied before now．A．must have received B．must have failed to receive C．must receive D. must fail to receive 9. You could have done much better yesterday．Why_________? A．didn’t you B．couldn’t you C. hadn’t you D．shouldn’t you 10．They have done things they ought_______ A．not to do B. not to be done
最新情态动词专项练习题及答案详解 一、单项选择情态动词 1．—Daddy, would you please buy me an iPhoneX? —If you can pass this midterm examination, you __________ have one as a reward. A．must B．need C．would D．shall 【答案】D 【解析】 【详解】 考查情态动词。句意：爸爸，你可以给我买部iPhone X吗？--如果你通过考试，你就会得到一部作为奖励。A. must一定；B. need必要；C. would将，会；D. shall会。根据语境可知，这句话是父亲对子女的允诺，故选D。 【点睛】 shall的用法。 1. shall作为助动词，一般用于第一人称Ⅰ和We，表示一个将来的动作，构成将来时态。shall后面接动词原形。例如： （1）I shall think it over and Let you know my idea.我将考虑一下此事，然后告诉你我的想法。 （2）We shall have a good time in the park.我们在公园里会玩得很高兴的。 2. shall用于第一人称，表示征求对方的意愿。如：What shall we do this evening? 3. shall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。如：Shall we begin our lesson? When shall he be able to leave the hospital? 4. shall用于第二、第三人称，表示说话人给对方命令、警告、允诺或威胁。如：You shall fail if you don't work harder. （警告） He shall have the book when I finish reading. （允诺）He shall be punished. （威胁） 比如本题，根据语境可知，这句话是父亲对子女的允诺，故选D。 2．Paul did a great job in the speech contest. He many times last week. A．need have practised B．might practise C．must have practised D．could practise 【答案】C 【解析】 【详解】 考查情态动词。句意：保罗在演讲比赛中表现得很好。他上星期一定练习了很多次。must have done是对过去发生的动作最有把握的猜测，意思是“一定”。故C选项正确。 3．Ann said whenever her father was unhappy he ________ go out and buy something, usually something large and useless. A．should B．could
情态动词讲解归纳集团公司文件内部编码：（TTT-UUTT-MMYB-URTTY-ITTLTY-
链接中考语法：情态动词一、情态动词的特点： 情态动词，又叫情态助动词。它们具有以下特点： ⑴它们必须与其他动词连用，即：情态动词＋动词原形，表示说话人对所述动作的看法，如需要、可能、意愿或怀疑等。 ⑵绝大多数情态动词没有人称和数的变化，即第三人称单数不加-s（以be和have开头的情态动词短语除外）。 ⑶在意义上，情态动词具有“多义性”。例如：can既可表示能力，又可表示可能、允许等意义。 二、部分情态动词的基本用法： 1.can的基本用法： ⑴表示体力或智力上的能力，即“能够，会”，可与beableto转换。例如：HecanspeakEnglish./HeisabletospeakEnglish. 他会讲英语。Canyouplaybasketball— No,I can’t.你会打篮球吗——我不会。 如果表示将来具备的能力，要用willbeableto。例如：IfIhaveagoodsleep,Iwillbeabletodotheproblem. 假如我睡个好觉，我就能做那道题目了。
⑵表示许可，主要用于口语，书面语一般用may。例如：Canwegohomenow,please— No,you can’t.我们可以现在就回家吗——不可以。Youcanonlysmokeinthisroom. 你只能在这间房间里抽烟。 You can’t keepthelibrarybooksformorethanamonth.图书馆的书借期不 可超过一个月。 ⑶表示“可能”，与may同义，但一般用在疑问句中。例如：Whatcanhepossiblywant他可能会想要什么呢另外，在否定句中，否定 形式can’t表示推测“不大可能”。例如：Anybodycanmakemistakes. 任何人都可能会犯错误。Thenews can’t betrue.那消息不大可能是真 的。 与第一、二人称连用时，还可以就可能的解决问题的方式或可能的行为 提出建议。在这里，也可用could使语气婉转。例如： Can/Couldwemeetagainnextweek下周我们可以再见面吗Whatshallwedo—Wecan/couldtryaskingLucyforhelp.我们怎么办呢—— 我们可以请露茜帮忙试试看。Youcan/couldhelpmewiththecooking.你可 以帮我做饭。 2.may的基本用法: ⑴表示“许可”，用can比较口语化。例如：Youmay/cancomeifyouwish. 如果你想来，你就来。Youmaynotpickflowersinthispark.
情态动词 （一）情态动词的定义: 情态动词表示说话人对某一动作或状态的态度。 （二）情态动词的特点 1. 情态动词有一定的词义。 2. 情态动词不能单独做谓语，它必须和其他动词的原形一起构成谓语。 3. 情态动词没有人称，数的变化。 （三）情态动词的结构和意义 1.情态动词的基本句型 ?肯定句：主语+情态动词+动词原形+...... ?否定句：主语+情态动词+not+动词原形+...... ?疑问句：情态动词+主语+动词原形+...... 2. 情态动词的意义 must“必须”；can/could“能，会”；may/might “可以”；should“应该”； would“愿，要”；have to“不得不”；need“需要” （四）情态动词的基本用法 1.can (could主要指过去时间) 1）表示人或物本身所具有的能力，意为“能，能够，会” : Two eyes can see more than one. / I can swim very well. 2）表示可能（理论上或是逻辑判断上） He can’t (couldn’t) have enough money for a new car. 3）表示允许： Can I have a look at your new pen? He asked whether he could take the book out of the reading-room. 4）表示对现在动作或状态的猜测，主要用于否定句和疑问句中或感叹句中: He can’t (couldn’t) be over sixty.他不可能超过六十岁。 5）could表示比can更委婉客气的提出问题或陈述看法，指的是现在时间。 Can (Could) you lend me a hand? 帮我一把好吗？ 2. may (might) 1）表允许，询问或说明一件事可不可以做，might指过去时间；但在疑问句中might也可指现在时间，语气比may更委婉。 May (Might) I ask for a photo of your baby? 我可以要一张你宝宝的照片吗？ 在回答以may引起的问句时，肯定回答是一般可仍用may,或Yes, please. / Certainly./Sure./Of course. ； 否定回答根据说话人的语气由强到弱分别选用: must not(mustn’t)（禁止）/ had better not（最好别）/ may not（不行） 2) may表可能,但所表示的可能性不如can所表示的那样肯定。might可以指过去时间，也可以指现在时间，但语气更加不肯定。 He may be at home. 他可能在家。 They might be having a meeting, but I’m not sure.他们有可能在开会，不过我不肯定。 3. must（have to表示客观需要） 1）表示“必须”（主观看法）时，用于肯定句或疑问句；用于否定句时表示“禁止”。 We must do everything step by step. 我们一切都必须循序渐进地做。 You must get home before 9:00. 2）表示揣测。意为“想必、准是、一定”等，只用于肯定句。 He must be ill. He looks so pale. 他准是病了。他的脸色苍白。 3)must的疑问句，肯定回答用must，否定回答用needn’t或don’t have to。 4. should 1）表责任或义务，意为“应该”，用于各种人称。
一、选择题 1．— May I have some wine? — No, you . You have to drive home later. A．shouldn't B．needn't C．mustn't D．may not 2．(2018·山东临沂) Could you please speak a little louder? I ______ hear you very well. A．can’t B．mustn’t C．shouldn’t D．needn’t 3．I hope you __________ to my birthday party. A．to come B．can come C．comes D．are come 4．I’ve bought a nice necklace for Jo’s birthday. She _____like it, but I’m not sure. A．can B．may be C．might D．must 5．The designer has tried every possible way to make the robot light, so you _____ worry about its weight. A．must B．may C．can’t D．needn’t 6．—Is that Kate’s green bike? —It ____________be hers. She likes pink. A．can’t B．could C．mustn’t D．might 7．—Is that cap Bob’s? —No, it ________ be his. His is blue. A．can’t B．mustn’t C．needn’t D．may not 8．—Hi, Lucy, may I sit here? —No, ________. The seats are for teachers and parents. A．you needn't B．you aren't C．you mustn't D．you don't 9．The milk tastes bad. You’d better_______. A．throw it away B．to throw it away C．throw them away D．to throw them away 10．You run with the train when it is coming. It’s dangerous. A．may not B．mustn’t C．needn’t 11．We _______ keep the new traffic law and learn how to protect ourselves. A．may B．should C．can D．need 12．I’m sorry, children over 1.4 me ters________pay the full price for the show. A．may B．must C．can D．ought to 13．—Could you please hang out with me this afternoon? —______. I have to make a plan for Clean-Up Day. A．Sorry, I couldn’t B．Sorry, I can’t C．Sure, I can D．Sure, I could 14．Since the road is muddy,it ________last night, ________? A．must be rained; wasn’t it B．must have rained; didn’t it
情态动词专项练习 1. Jean have kept his promise. I wonder why he changed his idea. A. must B. should C. need D. would 解析：选B. “should have +过去分词” 表示“过去本来应该(但没能)做某事”； keep one’s promise 意为“信守诺言”。 2. Jane have come to the party, but she not find the exact time. A. could; could B. might; could C. should; could D. should; would 解析：选A.“ could have+过去分词表示过去本来应该(但没能)做某事”。 3. So many mistakes in your homework! You more careful. A. may be B. had to C. would be D. should have been 解析：选D. “You should have been more careful”. 意为：你本来应该更细心的。 4．Her brother be at home now, because he was seen playing basketball in the stadium just now. A. mustn’t B. needn’t C. can’t D. shouldn't 解析：选C. can’t be at home 意为：不可能在家。 5．---I can’t understand wh y our boss is late. ---He the early bus. A. could miss B. may have missed C. can have missed D. might miss 解析：选B. “may have+过去分词”表示对过去动作的判断，意为：可能做了某事。注意：can表示可能时，只能用于疑问句和反问句。 6. She didn't answer the phone, she ______ asleep. A. may be B. must be C. should have been D. must have been 解析：选D. 表示：对过去发生的事情的肯定推测。 7．The little girl’s eyes were red. She ______. A. may cry B. must cry C. must be cried D. must have been crying 解析：选D. 意为：她刚才肯定一直在哭。对过去某事正发生的推测。 8．He______ his supper now, for the dining hall is still closed. A. can’t be having B. needn’t be having C. mustn’t be having D. shouldn't be having 解析：选A. 对现在正在发生的事情的否定推测。 9．I parked my bike behind the building, but now it is gone. It ________ . A. may be stolen B. must be stolen C. must have been stolen D. must have stolen 解析：选C. 对过去发生的事情的肯定推测的被动式。 10. ______ Mr. Black_______go to work by ferry before the bridge was built? A. Did; used to B. Use; to C. Did; use to D. Does; use to 解析：选C. used to do的疑问式，可以是Used+主语+to do ?或Did +主语+use to do? 11. The hotel is only a stone’s throw away, you ______ take a bus. A. need not to B. not need to C. don't need D. need not 解析：选D. 说话人认为不必要乘车, need 为情态动词。 12. I am busy now, _______ my brother do it for you ? A. Will B. Shall C. Must D. May 解析：选B. 在疑问句中shall 用于第三人称，也表示征求意见。 13. ---You needn’t do it right now, need you? ---Yes I am afraid I ______ . A. need B. needn’t C. must D. mustn’t 解析：选C. Yes的意思是：不。意为：恐怕我必须现在就做。 14.My English-Chinese dictionary has disappeared . Who _____ have taken it? A. should B. must C. could D. would 解析：选C. could/can have done 用于否定推测和疑问推测。 15. ---The room is so dirty._______ we clean it? ----Of course.
最新高一情态动词专项练习题 一、单项选择情态动词 1．I use a clock to wake me up because at six o'clock each morning the train comes by my house. A．couldn't B．mustn't C．shouldn't D．needn't 【答案】D 【解析】 试题分析：考查情态动词辨析。A不可能；B禁止，千万不能；C不应该；D不需要；句意：我不需要使用闹钟叫醒我，因为每天早上六点都有一列火车经过我的家旁边。根据句意可知我不需要使用闹钟。故D正确。 考点：考查情态动词词义辨析 2．Mr. Baker, some students want to see you. ______ they wait here or outside? A．May B．Should C．Shall D．Will 【答案】C 【解析】 【详解】 考查Shall的用法。句意：贝克先生，有些学生想见你。他们是在这里等还是在外面 等?Shall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。故选C。 【点睛】 Shall的用法 Shall作为助动词，一般用于第一人称Ⅰ和We，表示一个将来的动作，构成将来时态。Shall后面接动词原形。例如： （1）I shall think it over and Let you know my idea.我将考虑一下此事，然后告诉你我的想法。 （2）We shall have a good time in the park.我们在公园里会玩得很高兴的。常考的特殊用法 1. Shall用于第一人称，表示征求对方的意愿。如：What shall we do this evening? 2. Shall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。如：Shall we begin our lesson?When shall he be able to leave the hospital? 3. Shall用于第二、第三人称，表示说话人给对方命令、警告、允诺或威胁。如：You shall fail if you don't work harder. （警告） He shall have the book when I finish reading. （允诺） He shall be punished. （威胁） 3．--- Oh, my God! I just missed the last bus back home. --- That’s really bad. I’m sure you ______ it, but you just didn’t hurry up. A．had caught B．could have caught C．could catch D．can catch