当前位置:文档之家› 情态动词must, can, could, may, might表推测的用法

情态动词must, can, could, may, might表推测的用法

情态动词must, can, could, may, might表推测的用法
情态动词must, can, could, may, might表推测的用法

情态动词must, can, could, may, might

表推测的用法:

情态动词中的must, can, could, may, might都表推测。其中must的可能性最大,can / could次之,may / might最小。具体用法如下:

1. must的用法

(1)表示推测“可能性”时,意思是“一定、准是”,语气较肯定,较有把握。He must be American. = It is certain that he is American. 他准是个美国人。

(2)must表推测只能用于肯定句。如果要表示“一定不、肯定不”的意思时,应用can`t,如询问某种可能时,应用can。

He must know my address. 他肯定知道我的地址。(一定)

He can`t know my address. 他肯定不知道我的地址。(一定不)

Can he know my address? 他知道我的地址吗?(询问可能性)

(3)must表示推测时,可以推测现在/正在发生的动作/过去发生的动作。

He must have a car now. (现在)他一定有辆小汽车。

He must be doing his exercises in the classroom.(正在进行)他一定在教室里做练习。

He must have finished the work.(过去发生)他一定已完成了工作。注:must表示推测时很少用于将来的情况。一般不用He must come tomorrow.可用It`s certain / I`m sure that he will come tomorrow. (4)在反意疑问句中,当附属部分含有表示推测意义的must时,疑问部分的助动词应与must后面的动词在非推测情况下的用法保持一致。

He must be a worker, isn`t he? (现在)他准时个工人,是吗?

It must have rained last night, didn`t it? (过去)昨晚一定下雨了,是不是?

You must have learned English for many years, haven`t you? (完成时)你一定学了好多年英语,是吗?

2. can / could的用法

(1)can表示推测“可能性”时,往往用于否定句或疑问句。Can`t“一定不”,语气很肯定。can在疑问句中意思是“会、可能”。

He can`t be at home. = It is impossible that he is at home. 他一定不在家。

(2)can /can`t后可接进行时/完成时,表示对现在发生的动作或过去发生

的动作进行推测。

They can`t be reading in the library. 他们一定不在图书馆读书。

He can`t have gone to Shanghai for I saw him a minute ago. 他不可能去了上海,我刚才还看见他。

It`s so late. Where can she have gone? 天晚了,她可能去哪儿了呢?

(3)在反意疑问句中,当陈述部分含有表示推测意义的can`t时,疑问部分的助动词应与can`t后面的动词在非推测情况下的用法保持一致.

He can`t be a teacher, is he? 他不是教师,是吗?

She can`t have finished her homework, has she?

她一定没有完成家庭作业,是不是?

(4)could可用于表示某事有可能发生或可能是事实。

Don`t eat it. It could be poisonous. 不要吃它,可能有毒。

The plane could be delayed by fog. 飞机可能会因为雾晚点。

(5)could还可以用于表示客气、委婉、礼貌的请求语气。

Excuse me, could you tell me the way to the bus station? Could you help me?

(6)couldn`t表示否定推测,表示某事不可能真实,或由于特定事实或环境

某事肯定不会发生。

It couldn`t possibly be poison. 这不可能是毒药。

注:有时与形容词的比较级连用强调某人或某物不可能再更多地具有某种属性。

You couldn`t be more wrong. 你真是大错特错。

I couldn`t be happier. 我简直是幸福极了。

3. may和might的用法

(1) may, might表示推测“可能性”时,意思是“可能”、“也许”,语气没有 must肯定。

He may / might be American. = It is possible that he is American. 他可能是个美国人。

注:might不表示过去时态,只是语气上比may更委婉,表示的可能性更小。(2)may, might表推测时,可以用于否定句,意思是“可能不、也许不”,但不用于疑问句。

He may / might not be at home. 他也许不在家。

(3)may, might可以推测现在正在发生的动作或过去发生的动作。

He may / might be sleeping now. (现在)他可能正在睡觉。

The boy may / might not be watching TV at home. (现在)

这个男孩可能没在家看电视

These students may / might have seen the film before.(过去)这些学生以前可能看过这部电影。

(4)may, might还可以推测将来的情况。

I think we should take raincoat with us, it may rain.

我想我们应该带上雨衣,可能要下雨了。

She might not come this afternoon. 她今天下午可能不来了。

情态动词和虚拟语气练习40题

从A、B、C、D四个选项中,选出可以填入空白处的最佳选项。

1.—Are you in a hurry?

—No,in fact I’ve got plenty of time. I ___wait.

A.must

B.need

C.may

D.should

2.—Someone is knocking at the door. ___ it be Venis?

—No,it ___ be her;she left for New York this morning.

A.Can;mustn’t

B.Might;can’t

C.May;doesn’t

D.Can;can’t

3.He didn’t agree with me at first,but I ____ persuade him to sign the agreement later.

A.could

B.might

C.should

D.was able to

4.—Is there a movie on in the cinema tonight?

—There___ be. I will phone the cinema and find it out.

A.might

B.should

C.can

D.could

5.You ___ be careful when you cross here —the traffic lights aren’t working.

A.can

B.ought to

C.might

D.may

6.You ___ out last night. I called you several times,but nobody answered.

A.must have been

B.must be

C.might have been

D.could be

7.You ___ fail to pass the entrance examination if you don’t study harder.

A.shall

B.could

C.must

D.should

8.When I was studying at Beijing University,I ___ take a walk along the

lake every evening.

A.will

B.would

C.could

D.shall

9.The party turned out to be a failure. I would rather ___ it.

A.not have attended

B.not attend

C.not to attend

D.not to have attended

10.Sir,you ___ be sitting in this seat. It is for women or children only.

A.can’t

B.oughtn’t to

C.won’t

D.needn’t

11.—Shall I tell Li Ming about the matter?

—No,you ___ . He has known about it already.

A.oughtn’t to

B.needn’t

C.shouldn’t

D.mustn’t

12.—Must I take a bus?

—No,you ___ . You can walk there.

A.must not

B.don’t

C.don’t have to

D.had better not to

13.—Why do you make me do so?

—I am sorry that you ___ do such a thing.

A.would

B.can

C.should

D.may

14.—Will you stay for lunch?

—Sorry,I ___ . My brother is coming to see me.

A.mustn’t

B.can’t

C.needn’t

D.won’t

15.What would have happened ___ ,as far as the riverbank?

A.if Bob has walked farther

B.if Bob should walk farther

C.had Bob walked farther

D.should Bob walk farther

16.Oh,Jane,you’v e broken another glass. You ought ___ when you washed it.

A.be careful

B.to care

C.have cared

D.to have been careful

17.It’s high time we ___ to the theater.

A.will go

B.shall go

C.are going to

D.went

18.—Could I use your telephone?

—Yes,of course you ___ .

A.could

B.will

C.can

D.might

19.It’s strange that they ___ nothing about this matter.

A.should know

B.would know

C.had known

D.knew

20.—Do you still remember the day when we went to the Great Wall?

—I can’t remember it well,but ___ sometime last autumn?

A.might it be

B.could it have been

C.could it be

D.must it have been

21.—I can’t get through to the general manager’s office anyhow.

—The line is busy. Someone ___ the telephone.

A.must use

https://www.doczj.com/doc/4b15056995.html,es

C.must have been using

D.must be using

22.He suggests we ___ to the cinema at once,otherwise we will be late.

A.must go

B.go

C.will go

D.would go

23.If only he ___ me yesterday!

A.had seen

B.would see

C.should see

D.saw

24.If you ___ wait a moment,I’ll go and find our manager.

A.can

B.should

C.will

D.must

25.—It is rather cold here. Shall we light a fire?

—No,we ___ because things are easy to catch fire.

A.won’t

B.can’t

C.mustn’t

D.needn’t

26.If I ___ you,I ___ more attention to English idioms and phrases.

A.was;shall pay

B.am;will pay

C.would be;would pay

D.were;would pay

27.—Would you have told him the answer had it been possible?

—I would have,but I ___ so busy then.

A.had been

B.were

C.was

D.would be

28.—Can children swim in this pool?

—Yes. However,at no time ___ they do so by themselves.

A.dare

B.should

C.need

D.could

29.Kunming is called“Spring City”,but it ___ snow in winter.

A.shall

B.can

C.must

D.might

30.—What’s the matter with you?

—Oh,I’m not feeling well in the stomach. I ___ so much fried fish just now.

A.shouldn’t eat

B.mustn’t have eaten

C.shouldn’t have eaten

D.mustn’t eat

31.—You look so upset. What’s wrong with you?

—The door ___ . Can you help me?

A.won’t open

B.won’t be opened

C.can’t open

D.can’t be opened

32.—Mum,I climbed to get the Teddy Bear from the top of the shelf.

—My goodness!You ___ yourself. You mustn’t do that next time.

A.must have hurt

B.should have hurt

C.may have hurt

D.can have hurt

33.Children under 12 years of age in that country ___ be under adult supervision when he is in a public library.

A.must

B.may

C.can

D.need

34.“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

35.—I don’t mind telling you what I know.

—You ___ . I’m not asking you for it.

A.mustn’t

B.may not

C.can’t

D.needn’t

36.—Mum,I’ve been studying English since 8 o’clock. ___ I go out and play with Tom for a while?

—No,I’m afraid not. Besides,it’s raining outside now.

A.Can’t

B.Wouldn’t

C.Dare not

D.Won’t

37.—Who is the girl standing over there?

—Well,if you ___ know,her name is Mabel.

A.may

B.can

C.must D shall

38.The driver has drunk too much wine and dangerous things ___ happen at any time.

A.should

B.can

C.must

D.need

39.We ___ booked. Look,this restaurant is almost empty.

A.must have

B.can’t have

C.should have

D.needn’t have

40.Listen! The fire engine is roaring. There ___ be a fire somewhere.

A.should

B.must

C.will

D.ought to

【答案及部分解析】1~5 CDDAB 6~10 AABAB 11~15 BCCBC 16~20 DDCAB 21~25 DBACC 26~30 DCBBC 31~35 ACADD 36~40 ACADB

1. may表示“可以”。

2. can用在疑问句和否定句中,表示可能性的推测。can’t表示“不可能”。

3. 情态动词can和be able to都可表示能力。当表示“过去成功地做了某事”时,常用was(were)able to。

4. 由下文的I will phone the cinema and find it out可知此处应用might。may或might 用在肯定句中,表示可能性的推测。

5. ought to表示劝告。

6. 题意为“我昨天晚上打了几次电话都没有人接,你一定是出去了”。must have done

常用来表示对过去发生情况的肯定推测。

7. shall用于第二人称或第三人称,表示说话者的意愿,有命令、警告、威胁、强制、允诺和决心之意。此题用shall,表示“警告”。

8. 情态动词would可以表示过去经常性或习惯性的动作。与used to相比,would不含有“现在已无此习惯”的意义。

9. 题意为“那次聚会以失败告终,我宁愿没参加”。would rather (not)have done表示的是过去发生的情况。

10.由题意可知,此处应用oughtn’t to,表示“不应该”。

11.由he has known about it already可知,此处应用needn’t,表示“没有必要”。

12. don’t have to表示“不必”。

13. should常用在形容词sorry,anxious,happy,delighted等后接的that从句中,表示“竟,会”等意义。

15.had Bob walked farther相当于if Bob had walked farther。在虚拟条件状语从句中,省略if时要把had,should,were等提到句首。

16. ought to have done表示“过去本来应该做某事而事实上并没有做到”。

17. “It’s(high或about)time”后所接从句时,从句谓语动词常用过去式。

18. 问句中情态动词could表示委婉客气。

19. 题意为“他们竟然对此事一无所知,真令人奇怪”。“It’s strange,possible...+that 从句”的句型中,从句谓语常用“should+动词原形”。

20. can(could)have done表示对过去发生情况的可能性推测,常用于否定句或疑问句中。

21. must be doing表示对现在正发生情况的肯定推测。

22. suggest,order,demand,request等表示建议或命令等的动词后接宾语从句,从句谓语常用“should(常省略)+动词原形”。

23. if only表示“但愿”。如果表示现在的愿望,句中谓语动词常用过去式;如果表示将来的愿望,句中谓语动词常用“would(could)+动词原形”;如果表示过去的愿望,句中谓语动词常用“had+过去分词”。

24. will表示“愿意”。

25. mustn’t表示“禁止”。

26. 表示与现在的事实相反,从句用一般过去时,主句谓语常用“would,could,should,might+动词原形”。

27. had it been possible相当于if it had been possible。but分句是描述当时的事实,故用一般过去时态。

28. at no time(在任何时候都不)位于句首时,句子应用部分倒装语序。should表示“应该”。

29. 此处用can表示“一时之可能”。

31. The door won’t open. 这门打不开。will表示“功能”,可译为“能,行”。又如:Each classroom will seat 60 students. 每间教室能容纳60名学生。

32. may(might)have done表示对过去发生情况的可能性推测,常用于肯定句中。

33. 题意为:“在那个国家12岁以下的儿童在公共图书馆时必须(must)有成年人监护。”

34. 由judge(法官)一词可断定,此处有强制、命令的语气,故填shall。

36. 此处句意为:“难道我不能(can’t)出去和汤姆玩一会儿吗?”

38. should表示“很可能”。

39. needn’t have done表示“本来不需要做某事而事实上已经做了”。

40. must be表示对现在发生情况的肯定推测。

英语语法专项习题-情态动词

1( ) 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

2( ) 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

3( ) 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

4( ) 1 His arm is all right. He___ go and see the doctor.

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

5( ) 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 6( ) 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

7( ) 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

8( ) 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 B

2. 1-5 C D B C A

3. 1-3 C A A

4. 1-3 D B C

5. 1-4 C B C C

6. 1-3 B A B

7. 1-3 C C C

8. 1-3 A D B

情态动词can的用法及一般疑问句whatquestions

情态动词"can“的用法 情态动词不能独立作谓语,不以人称和数量的变化而变化,后接动词原形,也就是说情态动词和动词原形一起构成谓语。我们常见的情态动词有:can,must,would等。接下来,我们就来学习一下情态动词"can"的用法。 ①表示能力,"can"译为"能;会" 例句:I can speak English. 译:我会说英语。 She can dance. 译:她会跳舞。 ②表示可能性,"can"译为"可能;会" 例句:Can you sing 译:你会唱歌吗 Can you swim 译:你会游泳吗 ③"can"用在肯定句中:主语+can+动词原形 例句:I can play the guitar. 译:我会弹吉他。 I can join the music club. 译:我可以加入音乐俱乐部。 ④"can"用在一般疑问句中:Can+主语+动词原形 肯定回答:Yes,主语+can 否定回答:No,主语+can't 例句:Can he play chess 译:他会下国际象棋吗 Yes,he can. 译:是的,他会。 NO,he can't. 译:不,她不会。 ⑤"can"用在否定句中:主语+can't+动词原形(can't 是 can not 的缩写) 例句:She can't play the piano well. 译:她弹不好钢琴。 I can't sing. 译:我不会唱歌。 ⑥"can"用在特殊疑问句中:特殊疑问词+can+主语+动词原形 例句:What can you see in the room 译:在房间里你能看见什么 ⑦当特殊疑问词是句子的主语时:特殊疑问词+can+动词原形 例句:Who can answer my question 译:谁能回答我的问题 注意事项 "can"后一定要接动词原形。 "can" 不以人称和数量的变化而变化。

情态动词表推测用法总结(整理稿)

情态动词表推测用法总结 (一)情态动词表推测 能用于表推测的情态动词: 英语情态动词表推测的时态构成 (1)语气部分:(以下情态动词语气由强至弱) 肯定句:must、may、might(=could) 否定句:can’t(=couldn’t)、mayn’t、mightn’t 疑问句:can、could(语气更加委婉不确定) (2)时态部分: 一般现在或一般将来时间的推测:情态动词+be;情态动词+v. 对过去时间的推测:情态动词+have done 对正在进行的时态的推测:情态动词+be doing (二)表许可、请求 1、 can, could 2、may, might 3、must 4、shall 5、will, would 1. can, could 1) 用在疑问句中,表示一般的请求。两者不同在于:用could 要比用can更加委婉,特别是没有把握得到允许时。 Can I go with you? 我能和你一起去吗?Could I ask you something? 我能问你一个问题吗? 2) 用在陈述句中,表示许可:You can leave when you finish your work. 做完事情后你才可以走。 2. may, might 1) may用在疑问句中,也表示一般的请求。同can相比,may比较正式,常常表示尊敬之意。并且,may在疑问句中常用于第一人称,很少有May you…/they…这样的句型。Might比较少用在疑问句中,它表示请求的时候常用陈述句。 May I make a suggestion? 我可以提个建议? 2) 用在陈述句中,表示许可,此时与can, could相近。 You may have a rest before we set out again. 我们再次出发之前你可以先休息一下。 3. must 1) 表示说话人“不许”和“禁止”某人做某事,有很强的劝告语气。 Cars must not be parked here.此地不准停车。 2) Must的一般疑问句的回答有两种,表示肯定,用Yes, you must. 表示否定,用No, you needn’t. Must I post this letter tomorrow? 我明天必须得寄掉这封信吗? Yes, you must. 是的,你必须明天寄掉。

情态动词表猜测的用法

情态动词表猜测的用法 情态动词must,can,could,should,may,might 等可以用在句中表示猜测。 1.“情态动词+动词原形”表示对现在或将来情况的猜测 I don’t know where she is. She may be in Wuhan. 2.“情态动词+进行式”表示对现在或将来正在进行的情况的猜测 At this moment, our teacher must be correcting our exam papers. 3.“情态动词+完成式”表示对过去情况的猜测 You must have been caught in the rain on your way home yesterday. 4.“情态动词+完成进行式”表示对过去正在进行的情况的猜测 Your mother must have been looking for you. 5.推测的否定形式用can’t/couldn’t,may not/might not表示

Mike can’t have found his car, for he came to work by bus this morning. 6.句子中含有表示猜测的情态动词时,其反 意疑问句的构成不能再用原句中的情态动词,而应根据原句在去掉情态动词的情况下的主谓关系来确定其反问形式。 ①The man in the white clothes must be a doctor, isn’t he? ②She must have seen the film before, hasn’t she? ③He must have an uncle abroad, doesn’t he? ④You must have met Uncle Wang in the shop yesterday, didn’t you? 7.在表示“猜测”方面的区别 情态动词must,can,could,should,may,might 都可以用于表示“猜测”(注意:could, might 表示推测时不表示时态, 其推测的程度不如can, may)。实际上,“猜测”与“可能性”在逻辑上是有必然联系的。如果认为没有某种可能性,人们就不会作出某些猜测。因此,请注意六个情态动词之间的区别与它们各

(完整版)情态动词表推测用法讲解及配套练习

情态动词must, can, could, may, might表推测的用法 情态动词中的must, can, could, may, might都表推测。其中must的可能性最大,can / could 次之,may / might最小。具体用法如下: 1.must的用法 (1)表示推测“可能性”时,意思是“一定、准是”,语气较肯定,较有把握。 He must be American. = It is certain that he is American. 他准是个美国人。 (2)must表推测只能用于肯定句。如果要表示“一定不、肯定不”的意思时,应用can’t,如询问某种可能时,应用can。 He must know my address. 他肯定知道我的地址。(一定) He can’t know my address. 他肯定不知道我的地址。(一定不) Can he know my address? 他知道我的地址吗?(询问可能性) (3)must表示推测时,可以推测现在/正在发生的动作/过去发生的动作。 He must have a car now. (现在)他一定有辆小汽车。 He must be doing his exercises in the classroom.(正在进行)他一定在教室里做练习。 He must have finished the work.(过去发生)他一定已完成了工作。 注:must表示推测时很少用于将来的情况。一般不用He must come tomorrow.可用It`s certain / I’m sure that he will come tomorrow. (4)在反意疑问句中,当附属部分含有表示推测意义的must时,疑问部分的助动词应与must后面的动词在非推测情况下的用法保持一致。 He must be a worker, isn’t he? (现在)他准时个工人,是吗? It must have rained last night, didn’t it? (过去)昨晚一定下雨了,是不是? You must have learned English for many years, haven’t you? (完成时)你一定学了好多年英语,是吗? 2.?can / could的用法 (1)can表示推测“可能性”时,往往用于否定句或疑问句。Can’t“一定不”,语气很肯定。can在疑问句中意思是“会、可能”。 He can’t be at home. = It is impossible that he is at home. 他一定不在家。 (2)can /can’t后可接进行时/完成时,表示对现在发生的动作或过去发生的动作进行推测。They can’t be reading in the library. 他们一定不在图书馆读书。 He can’t have gone to Shanghai for I saw him a minute ago. 他不可能去了上海,我刚才还看见他。 It’s so late. Where can she have gone? 天晚了,她可能去哪儿了呢? (3)在反意疑问句中,当陈述部分含有表示推测意义的can’t时,疑问部分的助动词应与can’t后面的动词在非推测情况下的用法保持一致. He can’t be a teacher, is he? 他不是教师,是吗? She can’t have finished her homework, has she? 她一定没有完成家庭作业,是不是? (4)could可用于表示某事有可能发生或可能是事实。 Don’t eat it. It could be poisonous. 不要吃它,可能有毒。 The plane could be delayed by fog. 飞机可能会因为雾晚点。 (5)could还可以用于表示客气、委婉、礼貌的请求语气。 Excuse me, could you tell me the way to the bus station?

情态动词表推测用法总结(整理稿)

补充强调:推测的句型特点(对某一次的推测句型有两部分:语气和时态) (1)语气部分:(以下情态动词语气由强至弱) 肯定句:must、may might ( =could) 否定句:can,t ( =couldn 't )、mayn t> mightn 't 疑问句:can> could (语气更加委婉不确定 (2)时态部分: have done 表示对过去的推测 be doing 表示对正在进行的推测 be表示对现在的推测 语气部分写在前时态部分写在后,组合在一起就是推测 (-)情态动词表推测的三种句_ 能用于表推测的情态动词:must, can, could, will, would, may, might, should, ought to 1. 在肯定句中一般用must (一定),may (可能),might / could (也许,或许)。 (1)He must/may/might know the answer to this question? 他一定/可能/也许知道这个问题的答案。 (2)It is cold in the room? They must have turned off the heating? 屋里很冷,他们肯定把暖气关了。 2. 否定句中用can't / couldn 't (不可能),may not/might not (可能不)。 (1)It can J t/couldn 't be the headmaster? He has gone to America.这不可能是校长,他去美国了。 (2)He may not/might not know the scientist. 他也许不认识那位科学家。 3. 疑问句中用can /could (能..?)。 (1) Could he have finished the task? 他可能把任务完成了吗? (2) Can he be at home now? 他现在能在家吗? 注:以上三种句式中情态动词的语气按程度都是依次递减的。Might, could并非的过may, can 去式,而表示语气较为委婉或可能性较小。 (二)情态动词表推测的三种时丄

情态动词can的用法

情态动词can 的用法: 一.定义: 情态动词是一种本身有一定的词义,他不能独立做句子的谓语,一般要和动词原形一起使用,给谓语动词增添情态色彩,表示说话人对有关行为或事物的态度和看法,认为其可能、应该或必要等。 注意:情态动词无人称和数的变化,情态动词后面跟的动词需用原形。 二.具体用法: 1. “能,会”(表示能力、功能),即有某种能力。 Eg, I can play volleyball. 我会打排球。 He can speak English. 我会说英语。 I can be good with children. 我会和孩子们相处得好。 2. “可以”(表示允许、许可、请求),常在口语中。 Eg,Can I have a hamburger? 可以吃一个汉堡吗? Alice can watch TV on the weekend. 在周末Alice可以看电视。 3.表示提出邀请,或者是表示说话时的礼貌,客气,委婉。 Eg,Can I help you? / What can I do for you? 我能为你效劳吗? Can you come to my birthday party? 你能来我的生日聚会吗? (这样的句子在回答时肯定通常用:Y es/ Sure/ nice /great/…等回答。否定时通常用:No/ sorry, I can’t/ No, thanks…等回答。) 4.另外还可以表示推测,某种可能性,意为“可能”,常用于否定句和疑问句中,此时can’t 译为“不可能”。 5. can 的过去式是could, could 用在过去时态中。 三.Can的句型结构: 1.含有情态动词can的肯定句:can 后用动词原形do / be… “主语+ 情态动词+动词原形+其他” Eg,(1)I can play sports. 我会体育运动。 (2)She can speak Chinese. 她会说汉语。 (3)They can have lunch at school. 他们可以再学校吃午饭。 2. 含有情态动词can的否定句:在情态动词can后面加"not"。否定式为can not= can’t “主语+ 情态动词+not +动词原形+其他” Eg,(1)I can not play sports. 我不会体育运动。 (2)She can’t speak Chinese. 她不会说汉语。 (3)They can’t have lunch at school. 他们不可以在学校吃午饭。 3. 含有情态动词can的一般疑问句:把can 提到句首,句首大写C,句末问号别忘记。一般情况下,用can提问,用can回答。肯定回答用Y es,…否定回答用No,…

最新情态动词表推测的讲解及练习题

九年级英语表推测语气的讲解与练习 表推测时,英语中只使用must,may,might,may not和can't。这五个表达的语气依次递减: must:一定(语气肯定) may:也许(不很肯定) might:或许(比may语气更弱) may not:也许不(表否定) can't:一定不(must的反义) 推测现在的事情用must,may,might,may not和can't+do或be e.g.She must be at home now. The boy may play now. 推测过去的事情用must,may,might,may not和can't+have done e.g.She might have been ill yesterday. He must have hold the party. 情态动词must, can, could, may, might表推测的用法 情态动词中的must, can, could, may, might都表推测。其中must的可能性最大,can / could次之,may / might最小。具体用法如下: 1.must的用法 (1)表示推测“可能性”时,意思是“一定、准是”,语气较肯定,较有把握。He must be American. = It is certain that he is American. 他准是个美国人。 (2)must表推测只能用于肯定句。如果要表示“一定不、肯定不”的意思时,应用can’t,如询问某种可能时,应用can。 He must know my address. 他肯定知道我的地址。(一定) He can’t know my address. 他肯定不知道我的地址。(一定不) Can he know my address? 他知道我的地址吗?(询问可能性) (3)must表示推测时,可以推测现在/正在发生的动作/过去发生的动作。 He must have a car now. (现在)他一定有辆小汽车。 He must be doing his exercises in the classroom.(正在进行)他一定在教室里做练习。 He must have finished the work.(过去发生)他一定已完成了工作。 注:must表示推测时很少用于将来的情况。一般不用He must come tomorrow.可用It`s certain / I’m sure that he will come tomorrow. (4)在反意疑问句中,当附属部分含有表示推测意义的must时,疑问部分的助动词应与must后面的动词在非推测情况下的用法保持一致。 He must be a worker, isn’t he? (现在)他准是个工人,是吗? It must have rained last night, didn’t it? (过去)昨晚一定下雨了,是不是?

情态动词can的基本用法

情态动词can的基本用法: 情态动词can有一定的词义,但不能独立存在,它必须与动词原形一起构成谓语。情态动词can没有人称和数的变化。其具体用法如下: 1. 表示"能、会",指脑力或体力方面的"能力"。例如: I can speak En glish. 我会讲英语。 Jim can swim but I can't. 吉姆会游泳,但我不会。 2. 表示"可能",常用于否定句或疑问句中,指某种可能性,此时can 't译为“不可能”。例如: Han Mei ca n't be in the classroom. 韩梅不可能在教室里。 Can he come here today, please? 请问他今天能到这里来吗? 3. 表示"可以",常用于口语中,指许可或请求做某事,可以代替 may。例如: Can I have a cup of tea, please? 请问我可以喝一杯茶吗? You can go out. 你可以出去了。 补充:can的过去式could,意为“能、会”,表示过去的能力 女口: He could write poems when he was 10. 他十岁时就会写诗。 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?一 Could I use your pen?我能用一下你的钢笔吗?一Yes, you can.可以。(注意回答) 情态动词can的基本句型:

1. 肯定句型为:主语+can+动词原形+其它。例如: They can play basketball. 他们能打篮球。 She can dance.她会跳舞。 You can go to watch TV. 你可以去看电视了。 2. ........................... 否定句型为:主语+can not(can't/cannot)+ 动词原形+其它。表示"某人不能(不会。不可能)做其中can't是can not的缩略式,英国多写成cannot。例如: You cann ot pass the ball like this. 你不能像这样传球。 I ca n't ride a motorbike. 我不会骑摩托车。 3. 疑问句句型分为:一般疑问句句型和特殊疑问句句型两种类型。 ⑴一般疑问句句型为:Can+主语+动词原形+其它。表示"某人会(能。可以)做吗?",用于口语时,常表示请求或许可。其肯定答语用""Yes,主语+can."作答; 否定答语用"No,主语+can't."作答。注意答语中做主语的人称代词,应根据问句中的主语作相应的变化。其变化规则为:第一人称问,则第二人称答;第二人称问,则第一人称答;第三人称问,第三人称答。例如: ①-Can you sing an En glish song for us? 你可以为我们大家唱一首英语歌吗?

情态动词can和could用法详解

情态动词can 和could 用法详解 can 和could 用法详解 1. 表示能力,could 是can 的过去。如: Can you speak English? 你会说英语吗? Could you speak English then? 那时候你会说英语吗? 2. 表示许可,注意以下用法: (1)对于现在或将来的“许可” ,要区分以下两种情况: a. 表示请求允许(即请求别人允许自己做某事),可用can(=may)或could(=might)(注意:这 里的could 并不表示过去,而是表示现在,只是语气较委婉)。如: Can [May, Could, Might] I come in? 我可以进来吗? b. 表示给予允许(即自己允许别人做某事),一般只用can(=may), 而不能用could或might。如: A: Could [Can] I use your pen? 我可以借用你的钢笔吗? B: Yes, of course you can. 当然可以。(注意: 此处不用Yes, you could) (2)对于过去的“许可” ,也要区分以下两种情况: a. 表示过去一般性允许(即表示某人随时都可以做某事),用can的过去式(即could)。如:When I lived at home, I could watch TV whenever I wanted to. 我住在家里时,想什么时候看电影就可以什么时候看(一般性允许)。 b. 表示过去特定的允许(即表示在过去某一特定情况下允许进行某一活动),则不用could, 而需换成其它表达(如:had permission 或was [were] allowed to)。如: I was allowed to see the film yesterday evening. 昨天晚上允许我去看了电影(特定的允许,所以不能用could)。 3. 表示推测: (1)对现在或将来的推测,can 通常只用于否定句或疑问句中,一般不用于肯定句: It can't be true. 那不可能是真的。 What can they be doing? 他们会在干什么呢? Can it be Jim? 那会是吉姆吗? 但could(可以表示现在)则可用于肯定句中: We could [may, might] go to Guilin this summer. 今年夏天我们可能要去桂林。(将来可能性)You could [may, might] be right, but I don 't think you are. 你可能是对的,但我并不认为你是

情态动词表推测用法总结及专项练习

情态动词表推测用法总结及专项练习 1.can / could用于表推测的用法 (1) 从使用句型上看,can 通常只用于否定句或疑问句,一般不用于肯定句,而could 可用于肯定句、否定句和疑问句。两者没有时间上的差别,只是could 比 can 更委婉,更不确定。如: It can’t [couldn’t] be true. 那不可能是真的。 What can [could] they be doing? 他们会在干什么呢? We could go there this summer. 今年夏天我们可能要去那儿。 注:can 有时也用于肯定句中表示推测,主要用于表示理论上的可能性(即 从理论上看是可能的,但实际未必会发生),或表示“有时”之意。如: Even experienced teachers can make mistakes. 即使是有经验的教师也可 能出错。 She can be very unpleasant. 她有时很令人讨厌。 (2) 从时间关系看,对现在或将来情况作推测,后接动词原形;对正在进行 的情况作推测,后接 be doing 结构;对过去情况作推测,后接动词完成式。如: He could have gone home. 他可能已经回家了。 He can’t [couldn’t] have understood. 他不可能理解了。 Why does he know this? Can [Could] someone have told him about it? 他 怎么知道? 会是哪个人告诉他了吗? (3) “could+完成式”除表示对过去的推测外,还有以下重要用法: ①表示过去没有实现的可能性,常译为“本来可以”。如: I could have lent you the money.Why didn’t you ask me? 我本来可以借 这笔钱给你的。你为什么不向我提出? ②用来委婉地责备某人过去应该做某事而没有去做,常译为“本来应该”。如: You could have helped him. 你本来应该帮助他的。 ③表示“差点儿就要”。如: I could have died laughing. 我差点儿笑死了。

情态动词表推测的用法

情态动词表推测的用法 一、must表示推测的用法 must表示推测时,只用于肯定句,表示很大的可能性,意为“一定,准是,必然会”。其否定形式是can’t/couldn’t (不可能)。例如: 1. You haven’t eaten anything since this morning; you must be hungry. 2. That can’t be Mary —she’s in hospital. 二、can/could表示推测的用法 1. can表示推测时,多用于肯定句和疑问句。当用于肯定句时,指“有时可能会”,是理论上的可能,其时间意义宽泛不具体。例如: Even experienced teachers can make mistakes. 2. could表示推测时,既可以用于肯定句,又可以用于疑问句。例如: My book has disappeared. Who could have taken it? 3. can’t/couldn’t表示推测时,用于否定句,是语气最强的否定推测,意为“不可能,一定不(是)”。例如: He can’t/couldn’t have see n her there. 【即学即练】 一、用表示推测的情态动词must, could, , can的适当形式填空。 1. — Hi, Tom. Any idea where Jane is? — She be in the classroom. I saw her there just now. 2. — I hear they went skiing in the mountains last winter. — It be true because there was little snow there. 3. Accidents happen on such rainy days. 二、翻译下列句子,注意情态动词的推测用法和情态动词后动词的形式。 —那个人一定是布朗先生。—不可能是他,他去纽约了。 【反义疑问句】又叫附加疑问句。它表示提问人的看法,没有把握,需要对方证实。反义疑问句由两部分组成:前一部分是一个陈述句,后一部分是一个简短的疑问句,两部分的人称时态应保持一致。如:She was ill yesterday, wasn’t she? They don’t work hard, do they?

情态动词can的用法小结复习课程

情态动词can的用法 在英语的学习过程中,情态动词是一个很重要的语法点,特别是情态动词can的用法比较复杂,以下是其几点用法: 一、Can的用法归纳 1.在语句中can可以表示主语的能力,在句子理解中可以翻译成“能”“会”“够”等意思。如句(1)和句(2): (1)Can you drive a car?你会开车吗? (2)Can you dance?你会跳舞吗? 在回答这类句子时,可以用Yes, I can;No,I can’t来回答。 2.在句子中can可以表示说话人许可的语气,理解时可以翻译成“可以”。如句(3)和句(4): (3)Can I use your pen?我可以用一下你的笔吗? (4)Can you help me?你能帮我一下吗? (5)May I use your pen?我可以用你下你的笔吗? 在口语中可以代替may,比较句(3)和句(5)。在回答这类句子时一般用 Sure,Of course或 Sorry等词来做肯定或否定应答。 3.在句子中can还可以用来表示推测和可能性。用情态动词加动词原型表示对现在发生动作或状态的推测,如句(6)和句(7);用情态动词加完成时态表示对过去发生动作或状态的推测,如句(8)和句(9): (6)It rains so heavily. Can he come here?现在雨下得这么大,他还会来吗? (7)Today is Sunday. He can't be at school.今天是星期天,他不可能在学校里。 (8)He can’t /couldn’t have gone to Beijing, for I had a talk with him just now.他不可能去过北京,因为我刚和他交谈过。 (9)She can’t /couldn’t have gone abroad yesterday.她不可能昨天就出国了。 二、 Can与could的用法比较

情态动词表示推测的用法

第五单元:情态动词表示推测的用法 一,对不同时态的推测 情态动词+do sth表示对现在事情的推测。 情态动词+be doing sth表示对正在发生的事情的推测。 情态动词+have done sth表示对过去或已完成的事情的推测。如: 1、They must be in the classroom now. 他们现在一定在教室里。 2、The light in the teachers’ office is still on. Miss Gao must be working. 老师办公室的灯还亮着,高老师肯定正在工作着。 3、Mike may (might) hurt in the traffic accident. 迈克可能在这次交通事故中受了伤。 4、He must have finished his homework yesterday. 他昨天肯定完成了作业。 二、情态动词表示推测,在不同句型中的用法: 1、在肯定句中,可使用的情态动词有:must, could, may, might,等;其肯定程度逐渐减弱,must表示一种很有把握的推测,意为“一定,肯定”,could/may/might表示一种不太有把握的推测,may意为“可能”,might意为“或许”could意为“可能”,could/may/might在表示推测时,无时态区别,只表示语气差异。如: (1)You have worked all this week .You must be tired. 你辛苦工作了一周,一定累坏了。 (2)Will you please answer the phone? It could /may/might be your mother. 请接一下电话好吗?可能是你的母亲打来的。 (3)According to the radio ,it may/might/could rain this evening. 根据广播,今晚可能下雨。 2、在否定句中使用can’t和may not/might not. can’t表示很有把握的否定推测,意为“不可能”;may not/ might not 表示不太有把握的否定推测,意为“可能不”如:(1)She can’t be at school .It’s Sunday today. 她不可能在学校,今天是星期天。 (2)She may not be there today. 今天她可能不在那儿。 (3)I think he might not come. 我认为他可能不来了。 3、在疑问中,一般只用can或could,意为“可能”如: (1)Who can it be at the door ?Can it be Tom? 门口会是谁呢?会不会是汤姆呢? (2)Where could it be? 它可能在哪儿呢? 三、在表示推测时,反意疑问句的两种情况; 1、对现在进行推测时,反意疑问句中的动词用一般现在时。如: (1)He must be good at English, isn’t he? (2)You might be watching TV at home ,aren’t you? 2、对过去进行推测时,若有明确的、表示过去的时间状语,反意疑问句中的动词用过去式;若没有明确的、表示过去的时间状语,反意疑问句中的动词用现在完成时。如:(1)It must have rained last night , didn’t it? (2)You might have been to the Great Wall, haven’t you? 附:belong to的用法 belong to 是动词+介词构成的短语,它表示所属关系,注意其用法:

情态动词can 的用法小结

情态动词can 的用法小结 情态动词是高考的考点,对中学生来说也是个难点,而can的用法较其他情态动词多,现根据中学课本和近几年的高考试题,将其重点内容列出。 一.表示能力 1.Can you type? 2.I can do it. 1. be able to 能用于各种时态。“设法做成某事” 相当于managed to do sth.. / succeeded in doing sth.。 2. can / could 只能表示现在或过去的能力。 例: 1)A computer ______ think for itself; it must be told what to do. A. can’t B. couldn’t C. may not D. might not 析:答案是A,表示能力. 2). The fire spread through the hotel very quickly , but everyone ______ get out. A. had to B. would C. could D. was able to 析:答案是D。表示经过努力才成功地逃出大火。 二.can/could 表示许可/允诺 1.Can/could Tom use the car? Yes , he can. 1.might, could 比较委婉, 一般多用于疑问句. 2.在以could, might 表示征询对方意见或表示请求时,回答应相应使用can, may. 例: 1). — Could I borrow your dictionary? — Yes, of course you _______. A. might B. will C. can D. should 析:答案是C。第一句的请求用could,所以回答时相应用can 2.)— Might I watch TV after supper? — Yes, you ________.

情态动词表推测归纳

情态动词表推测归纳 一、can/could can和could没有时态上的区别,只是表示可能性的大小,can表示的可能性比could大。 (1)对现在或将来动作或状态的推测 The shy girl can’t (couldn’t) be our monitor. 这位害羞的女孩不可能当我们的班长。 (2)对过去事实的推测 can (could)+have+动词过去分词,表示推测过去某动作“可能”发生了,或者表示过去某动作有可能发生,但未发生,意为“本来可以……”。 can’t(could’t)+have+动词过去分词,表示推测过去动作一定没有发生。He’s an hour late, and the bad weather can have delayed him. 他迟到了一小时,可能是恶劣的天气使他耽误了。 The road isn’t wet. It couldn’t have rained last night. 路面没有湿,昨天晚上肯定没下雨。 二、may/might (1)对现在或将来动作或状态的推测 She may (might) be washing her clothes. 她可能正在洗衣服。 (2)对过去事实的推测 A.may/might+have+动词的过去分词,表示推测过去某动作“也许”发生了; might+have+动词的过去分词,表示推测的语气更加委婉。 He says that she may/might have misunderstood him. 他说她可能误解他了。 B.may/might+have+been+动词的现在分词,表示推测过去某动作是否正在 进行或一直在进行。 He may/might have been buying stamps when you saw him. 你看见他时他可能正在买邮票。

九年级英语情态动词表推测用法总结

九年级英语情态动词表推测用法总结 能用于表推测的情态动词:must, can, could, will, would, may, might, should, ought to 1.在肯定句中一般用must (一定),may(可能),might / could(也许,或许)。 (1)He must/may/might know the answer to this question? 他一定/可能/也许知道这个问题的答案。 (2)It is cold in the room. They must have turned off the heating. 屋里很冷,他们肯定把暖气关了。 2.否定句中用can’t / couldn’t(不可能), may not/might not(可能不)。 (1)It can’t/couldn’t be the headmaster. He has gone to America. 这不可能是校长,他去美国了。 (2)He may not/might not know the scientist. 他也许不认识那位科学家。 3.疑问句中用can/could (能……?)。 (1)Could he have finished the task? 他可能把任务完成了吗? (2)Can he be at home now? 他现在能在家吗? 注:以上三种句式中情态动词的语气按程度都是依次递减的。Might, could并非may, can 的过去式,而表示语气较为委婉或可能性较小。 1.

(1)She must / may / might / could arrive before 5. 5:00前她一定/可能/也许到。 (2)She must/may/might/could walk miles and miles among the hills without meeting anyone. 她一定/可能/也许会在山里一连走好几英里而遇不到一个人。 2.对现在或一般情况的推测, (1)He must / may / might / could be listening to the radio now. 他一定/可能/也许正在听收音机。 (2)He can’t ( couldn’t ) / may ( might ) not be at home at this time. 这个时候他不可能/可能不在家。 (3)Mr. Bush is on time for everything .How can ( could ) he be late for the opening ceremony ? 布什先生一向准时,这次开幕式他怎么可能迟到呢? 3. (1)It must / may / might / could have rained last night .The ground is wet. 地湿了,昨晚肯定/可能/也许下雨了。 (2)The door was locked. He can ( could ) not / may ( might ) not have been at home . 门锁着,他不可能/可能不在家。 (3)Can / Could he have gotten the book? 难道他找到书了吗? 注:情态动词should /ought to表推测时,意为“想必会,理应……”但与“have +过去分词”连用时,则又可构成虚拟语气意为“本应该做某事却没做”。例如: (4)It’s seven o’clock. Jack should/ought to be here at any moment. 现在七点钟了,杰克理应随时到达。(推测) (5)She should / ought to have attended your birthday party, but she had to look after her mother in hospital.

小学情态动词can的用法

(小学)情态动词can 的用法 一根据所给提示填空。 1 He ________ _______ _______ ________(会铺床). 2 She ______ ______ ______ ________(不会打扫房间). 3 My mother ________ cook the meals .我妈妈会做饭。 4 她姐姐会说英语。Her sister_______ speak English . 5 你会唱歌吗?______ ______ sing ? 二根据所给句子写出或完成相应的句子。 1 ____________________________ We can play the piano . 2 What _____ he do ? He can fly kites . 3 _________________________ Y es, I can . 4 Can Sarah water the flowers ? ______ she can’t . She can _______ the windows . 5 What can your father do ? ____________________________ 三句型转换 1 I am helpful .(主语用they来替换) ———————————————————————————— 2He can clean the desks . (改为一般疑问句并作肯定回答) ———————————————————————————— 3the clothes he can away put (连词成句) ———————————————————————————— 4Mark can read books.(改为否定句) ———————————————————————————— 5at do can home What you(连词成句) ________________________________________________________

相关主题
文本预览
相关文档 最新文档