情态动词--modalverbs

情态动词--modalverbs

情态动词(Modal verbs)

情态动词有can (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.

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.The 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.

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 i f 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。

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,且没有“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

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,且没有“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 woul d 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

情态动词:

1. 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

2.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

3.Need 表示需要、必须,主要用于否定句和疑问句中

4.should 意为“应该”,表示要求和命令

表示劝告、建议

5.had better 意为“最好”,表示建议

https://www.360docs.net/doc/8219145904.html,/doc/dc16607312.html,ed to 意为“过去常常,表示过去的动作、行为。

Exercise:

1.—That must be a mistake.

—No, it _____ a mistake.

A.must not be

B. needn’t be

C. cannot be

D. would not be

2. —_____ I water the trees on Tuesday?

—No, you needn’t.

A.Can

B. Must

C. May

D. Shall

3.He _____ not pay unless he is punished to pay.

A.shall

B. will

C. can

D. would

4.I _____ such a mistake again.

A.shall never make

B. may never make

C. can never do

D. need never do

5. —_____ I turn on the radio?

—You’d better not. It is noisy enough in this room.

A. Shall

B. Must

C. Need

D. Do

6.Let’s go to the library this afternoon, _____?

A.shall we

B. will we

C. can we

D. should we

7.Where are my keys? I _____ lost them.

A.ought to

B. should have

C. will have

D. must have

8.Even if he has time, he _____ shopping in town on Sunday.

A.won’t go

B. will go

C. won’t go to

D. d oesn’t go

9.He _____ finished earlier.

A. shall have

B. ought to

C. could have

D. must have

10.In case I _____, I would try again.

A. will fail

B. would miss

C. should fail

D. shall miss

11. Since the road is wet this morning, _____ last night.

A.it must rain

B. it must have rained

C. it must be rained

D. it must have been rained

12.He asked me if he _____ open the window.

A.shall

B. would

C. will

D. should

13.Everyone _____ do his best to make the world safe and clean.

A. can

B. may

C. should

D. had to

14._____ to have lunch with us today?

A.Do you like

B. Would you like

C. Will you like

D. Have you like

15.—Will you lend me your book?

—Yes, I _____.

A.will

B. need

C. can

D. must

16.If I had time, _____ see that new movie at the Capital

Theater.

A.I will

B. I may

C. I shall

D. I would

17.The English of her composition is too good. She can’t _____ it herself.

A.have to write

B. have written

C. write

D. be written

18.You _____ the look on his face when he won the lottery.

A.would have seen

B. can be seeing

C. must see

D. may see

19.The light is out in her room; she _____ to bed.

A.must have gone

B. had gone

C. must be going

D. must go

20.They _____ that far; but they stopped to have a snack on the way.

A.might be gone

B. needed go

C. could have gone

D. ought have gone

21. He _____ to the farm yesterday.

A.need go

B. needed go

C. has to go

D. had to go

22.He is so strong that I _____ fight against him.

A.dare not

B. did dare not

C. didn’t dare to

D. dare not to

23. I couldn’t _____ cry while I was watching the movie “T o live”.

A. help to

B. help

C. help but to

D. help but

24.They asked Tom to give him a drink, but he _____.

A. hadn’t

B. wasn’t

C. wouldn’t

D. could

25. As physics is hard enough, I _____ study it.

A. am not able

B. couldn’t

C. am not able to

D. cannot

26.You _____ to the meeting this morning if you have something important to do.

A. needn’t to come

B. don’t need come

C. don’t need coming

D. needn’t come

27._____ you fetch me some hot water?

A.Can

B. May

C. Must

D. Might

28.You _____ get down the bus until the bus has stopped.

A.can’t

B. needn’t

C. mustn’t

D. don’t

29.—Would you come and join us?

—I wish I _____. I am busy at the moment.

A.can

B. could

C. would

D. should

30.You _____ right, but I don’t think you are.

A.may be

B. could be

C. would be

D. should be

1—5 CBBAA 6—10 ADACC 11—15 BDCBA 16—20 DBAAC 21—25 DADCC 26—30 DACBA

解析:

1.cannot表示否定的推测。

2.用must提问通常用needn’t来做否定回答。

3.will表示意愿。

4.shall用在第一人称构成将来时态。

5.shall用在疑问句中表示征求对方的意见。

6.Let’s的反意疑问句用shall we构成。

7.must have done表示对过去的事情的肯定推测。

8.won’t表示意愿。

9.could have done表示“本来可以……”。

10.in case的意思是“万一……”,后面经常用should的虚拟语气形式。

11.must have done表示对过去的事情的肯定推测。

12.should是shall的过去式,用在过去时中表示征求对方意见。

13.should表示有责任、应该做某事。

14.would you like to是用来向对方提出邀请时的表达法。

15.will表示意愿。

16.would表示与现在事实相反的虚拟语气。

17.can’t have do ne表示对过去情况否定的推测,翻译成“不可能”。

18.would have done表示与过去事实相反的虚拟语气。

19.must have done表示对过去的事情的肯定推测,翻译成“一定是”。

20.could have done表示“本来可以……”。

21.had to表示“不得不”;need作情态动词时用在否定及疑问句中。

22.dare作情态动词时直接用not进行否定,后面用动词原形。

23.can’t help but do表示“忍不住”。

24.would用在过去时中表示意愿。

25.be able to表示在特定情况下做成一件事。

26.need作情态动词时直接用not进行否定,后面用动词原形。

27.can用在疑问句中表示向对方提出请求。

28.mustn’t表示“禁止、不能”。

29.wish后面的宾语从句要用虚拟形式。

30. may表示不太肯定的推测。

modals情态动词

Modals (1) Permission, Prohibition, Obligation, No obligation To express permission, prohibition, obligation and no obligation we usually use modal verbs. Permission Can is often used to ask for and give permission. ?Can I sit here? ?You can use my car if you like. ?Can I make a suggestion? We can also use may and could to ask for and give permission but can is used more often. Prohibition Both can’t and mustn’t are used to show that something is prohibited – it is not allowed. ?You can’t park here, sir. ?You can wear jeans but you can’t wear trainers in that bar. ?You mustn’t speak when the teacher is speaking. Can’t tells us that something is against the rules. Mustn’t is usually used when the obligation comes from the person who is speaking. Obligation Have to and must are both used to express obligation. There is a slight difference between the way they are used. Have to shows us that the obligation comes from somebody else. It’s a law or a rule and the speaker can’t change it.

英语语法: 情 态 动 词

英语语法:情态动词 情态动词(Modal verbs)本身有一定的词义,表示语气的单词。但是不能独立作谓语,只能和动词原形一起构成谓语。情态动词用在行为动词前,表示说话人对这一动作或状态的看法或主观设想。小编在这里整理了相关知识,快来学习学习吧! 英语语法:情态动词 一、can和could 1、can的用法 (1)表示体力和脑力方面的能力。 (2)表示对现在的动作或状态进行主观的猜测,主要用在否定句和疑问句中。 (3)表示可能性,理论上的可能性,意为“有时候可能会”,可用于肯定句。 (4)表示允许,意思与may接近。 (5)表示说话人的推测、怀疑、惊异、猜测或不肯定等,主要用于否定句、疑问句或感叹句中。 (6)can的特殊句型 cannot…too / enough表示“无论怎么。。。也不过分”。“越。。。越好”。 cannot but+ do sth.表示“不得不,只好”。 2、could的用法 (1)表示能力,指的是过去时间。 (2)表示允许,指的是过去时间。 (3)表示可能,可以指过去时间,也可以指现在时间,表示语气缓和。 (4)委婉客气地提出问题或陈述看法,指的是现在时间。主要用于疑问句,回答时用can。 3、can与could的区别 can表推测时只用于否定句和疑问句(could无此限制)。couldn’t的可能性比can’t 小。 4、can与be able to的区别 (1)现在时:无区别,但后者不常用。 (2)完成时;can没有完成时,此时要用have(has,had)been able to。 (3)将来时:can没有将来时,要用will be able to。

情态动词的用法总结归纳表

情态动词的用法总结归纳 一、情态动词的定义 情态动词(Modal Verbs)用于表示说话人的态度和情感,如可能性、必要性、意愿、推测等。它们不能独立作谓语,只能与其他动词原形构成谓语。 二、常见情态动词 1.can (could) :表示能力、可能性或允许。 2.may (might) :表示许可、祝愿或推测。 3.must :表示必须、义务或推测。 4.shall (should) :表示命令、允诺、建议或推测。 5.will (would) :表示意愿、将来或习惯。 三、情态动词的用法 1.基本用法:情态动词+动词原形。例如:He can swim.(他会游 泳。) 2.情态动词无人称和数的变化,即情态动词第三人称单数不加-s。 例如:She may go.(她可以去。) 3.情态动词没有非谓语形式,即没有不定式、分词等形式。 4.情态动词后接动词原形,否定形式是在情态动词后加not。例 如:You mustn't smoke here.(你不可以在这里吸烟。)

5.带有情态动词的疑问句和否定句变换只需将情态动词提到主语 前或直接在情态动词后加not。例如:Can he dance?(他会跳 舞吗?)He can't dance.(他不会跳舞。) 6.情态动词可以表示推测和可能性。例如:It may rain tomorrow. (明天可能会下雨。) 7.情态动词可以表示命令和建议。例如:You should study hard. (你应该努力学习。) 8.情态动词可以表示习惯和规律。例如:He will arrive at nine. (他将在九点到达。) 9.情态动词可以与完成时连用,表示对过去的推测和猜测。例如: She may have gone to the cinema.(她可能去看电影了。) 10.情态动词可以与进行时连用,表示对现在的推测和猜测。例如: He must be studying in the classroom.(他一定在教室里学 习。) 四、注意事项 1.情态动词后面接的是不带to的动词不定式,即动词原形。 2.情态动词没有人称和数的变化,即不论主语是第一人称、第二 人称还是第三人称,也不论主语是单数还是复数,情态动词的 形式都一样。 3.情态动词不能单独作谓语,后面必须接动词原形一起构成谓语。

情态动词--modalverbs

情态动词--modalverbs 情态动词(Modal verbs) 情态动词有can (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”。----

modal verbs讲解

情态动词modal verbs 情态动词表示说话人的某种感情或语气,对某一动作或状态的某种态度,表示“需要”“可以”“应该”等意义。情态动词有以下特征: 1. 不能单独作谓语,除ought to 和used to 以外,后面只能接不带to 的不定式。 2. 没有人称和数的变化。但有些情态动词,如can, will, dare有一般现在时和过去时的变化。 3. 情态动词的“时态”形式并不是区别时间的主要标志,很多情况下,情态动词的现在时形式和过去时形式都可用来表示现在时间、过去时间或将来时间。 PartⅠ 1 . 表示“能力” 与be able to 的区别: can 只有现在和过去时态,强调能力; be able to有各种时态,表示“一时”, “某一次具体”的能力,强调结果. was / were able to : “(过去)成功地做到…” Mary can play the piano .She has been able to play it since she was 5. Yesterday I was able to get home before the heavy rain. A big fire broke out in the hotel last night. Fortunately, all people were able to escape. 相当于managed to do sth. /succeeded in doing sth. 2.表示“许可”、“请求”(表示请求时,口语中常用could 代替can,使语气更加婉转,但回答要用can。) --Could I use your bike? --Yes, you can. 3.表示“理论上或一时的可能”(主要用于肯定的陈述句) Anybody can make mistakes. It can be dangerous to go traveling without a mate. Wuhan can be very hot in summer. I like kids, but they can be very naughty sometimes. 4. 表示推测(主要用于否定句和疑问句) (此时,could表示可能性比can 低,不表示过去时)He can't be at home, for the lights are off. Can the news be true ? You couldn’t have seen me in the museum yesterday, because I was sleeping at home all day. 在这种用法中,can / could也可以表示惊讶、怀疑、不相信的态度。如: She’s so young. Can she be your mother? How can you believe such a liar as him? 1.表示“许可” “征询对方许可”(征询对方许可时,might 比may 更婉转) You may use my computer tonight. ---May I leave now? ---No, you mustn’t. / Yes, you may / certainly. / Sure. / Of course. 2. 表示猜测,推测(主要用于肯定句和否定句) (此时,might表示可能性比may 低,不表示过去时) He may / might be very bust now. It may not rain tomorrow. Nobody has ever seen him since that year. He may / might have gone abroad. 3. 用于” may+主语+动词原形” 结构, 表示“祝福” May you succeed. May you have a bright future. 注意:

情态动词讲解

情态动词(Modal Verbs)(一) 我们常见的英文动词有:及物动词(Transtive V erbs)、不及物动词(Intranstive Verbs)、助动词(Axiliary Verbs)、联系动词(Link Verbs /Copula)和情态动词(Modal Verbs)。其他还有:非谓语动词,如:动词不定式、动名词。 这回我们就来谈谈情态动词(Modal Verbs 注意Modal 不是Model 喔)。 * 情态动词也可称为"情态助动词(Modal Auxiliaries)",因为它和基本助动词(be,do, have)都属于助动词类。* 情态动词和其他动词连用,可表示说话人的语气。 * 情态动词可表达建议、要求、可能和意愿等。 * 情态动词没有人称和数的变化。 * 常用的情态动词有:can, could, may, might, must, shall, should, will, would这九大情态动词;其他的还有ought to, need, dare 等。 其实我们这里谈的情态动词,它的特征用法,有许多方面和助动词是一样的(请参阅《英文语法拉杂谈》助动词);但为了方便阅读,因此即使相同的部份,这里也同样列出。 一、情态动词的变化:(情态动词could,动词to work) 1.1 简单型(Simple):表示现在或将来的状态 I could work .(动词不可加to ,如:to work。下同) You could work .He could work She could work It could work We could work They could work 1.2 完成式型(Perfect):表示过去的状态 I could have worked (动词是have + v-ed 过去分词。下同) You could have worked He could have worked She could have worked It could have worked We could have worked They could have worked 1.3 进行式型(Continuous):表示现在或将来还在进行的状态 I could be working (动词是be + v-ing 现在分词。下同) You could be working He could be working She could be working It could be working We could be working They could be working 1.4 完成进行式型(Perfect Continuous):表示过去正在进行的状态 I could have been working (动词是have been + v-ing 现在分词。下同) You could have been working He could have been working She could have been working It could have been working We could have been working They could have been working 二、情态动词的疑问句:只要将情态动词移到主语(Subject)的前面,句尾加上问号。这样就成了疑问句。 1. She can work.(主语she, 情态动词can,动词work) Can she work ? (这就是疑问句) 2. He would be working. (主语he, 情态动词would,动词be working) Would he be working ? 3. They should have worked. (主语they, 情态动词should, 动词have worked) Should they have worked ? 4. I could have been working. (主语I, 情态动词could, 动词have been working) Could I have been working ? 三、情态动词的否定句:在情态动词的后面加上not 就成了情态动词否定句。 1. She can work. She cannot work. (注意:can 和not 须连在一起)(这就是否定句) 2. He would be working. He would not be working. (would not) 3. They should have worked. They should not have worked. (should not) 4. I could have been working. I could not have been working. (could not) 四、在口语中,否定情态动词的缩写法: 1. cannot ---- can't 2. could not ---- couldn't 3. might not ---- mightn't (很少用) 4. must not ---- mustn't 5. shall not ---- shan't (几乎没人用了) 6. should not ---- shouldn't 7. will not ---- won't (可不是win't 喔!) 8. would not ---- wouldn't

Modal Verb

Modal Verb Ⅰ、基础知识 一、情态动词主要用以表明说话者对某一行为的态度和观点。情态动词具有一定的词义,但不能单独作谓语 , 要和动词的原形连用构成谓语,也没有人称和数的变化。 二、常用的Modal Verb有can, could, may, might, must, will, would, shall, should, ought to, dare, need, used to, had better, would rather, have to等。 三、否定形式:ought to—ought not to have to—don't have to had better—had better not; would rather—would rather not; used to—used not to / didn't use to Ⅱ、基本用法 一、can / could 1、能力(could为can的过去式) (1)can表示现在的或一般的能力,比be able to更普遍使用; (2)could表示过去的能力,而was/were able to含过去成功地/设法努力做成某事的意思。 (3)be able to可用于其他更多时态,will be / haven't been able to等。 2、请求、允许 (1)在疑问句中请求、征求对方意见时,could在语气上比can更委婉、客气或尊重; (2)在回答时,如果给予对方肯定回答时,要用can,不能用could;或可用of course等;而否定回答时,常用sorry,but…等。 (3)表请求还可用may, might; may比can, could要柔和、礼貌、正式,而might最委婉和正式。 3、关于can / could的习惯用语 (1)忍不住做某事;无法抑制/ 避免做某事: cannot help doing sth;cannot help but do sth (2)只能:can but do sth = can only do sth (3)再……也不为过;越……越好cannot / never 与enough 或too 连用 ①cannot +动词+too +形容词或副词 One can never be too careful. 越仔细越好。 One cannot emphasize this point too much. 再怎么强调这一点都不为过。 ②cannot +动词+形容词或副词+enough Drinking water can never be pure enough. 饮用水越纯越好。 I can't thank you enough. 我怎么感谢你也不过分。 ③cannot +over- 动词/cannot + be + over- 形容词 We cannot overemphasize the importance of learning a foreign language. 我们无论怎么强调学外语的重要性也不过分。 ④It is impossible to emphasize this point too much. 要特别强调这一点。 ⑤We cannot praise him too much. 我们无论怎样表扬他也不算过分。 ⑥I think it right that one cannot learn too much knowledge. 我认为一个人的知识愈多愈好。

情态动词(Model Verbs)讲解

情态动词(Model Verbs) 情态动词(Model Verbs) 又称为情态助动词(Model Auxiliaries), 情态动词是一种本身有一定的词义,但不能单独作谓语, 只能和其他动词原形构成谓语。主要有can, may, must, could, might, shall , should, will, would, ought to, need, dare等。情态动词与其他动词连用表示说话人的表示说话人的情绪,态度或语气的动词,。情态动词可表达建议、要求、可能和意愿等。情态动词没有人称和数的变化。 情态动词意义分类 注意:与情态动词连用的其他动词是原形,不可带to 情态动词没有人称和数的变化,使用于所有人称

一.can 和could 的用法: 1.表示:能力ability and capacity 意“能够”表示人或动物的内在能力 即有某种知识或者技 能而能够做某事。有时可以和be able to互换。 He can swim across the river ( He is able to swim across the river) Can she speak English ? ( Is she able to ----) He hurt his foot and couldn't (wasn't able to) play football. 他脚受了伤,所以他不能踢足球了。 can 和be able to 的区别: (1)表示能够时,can只能用在现在时(can)和(could)过去时。而be able to 可用于各种时态

The baby will be able to walk next month 将来时,不能用 I hope to be able to see her again 不定式,不用 (2)be able to暗指做成了某一事情。(manage to) Because he worked hard, he was able to pass his examination. 因为他努力工作,所以他能及格。 (3)can 可以表示人的能力或物的 能力,而be able to 只能表 示人的或生物的能力,不表示 物的能力。 The boat is able to carry five people ( 错) The boat can carry five people (正)

modal verbs

Modal verbs 情态动词 一.表示能力 can/could be able to(除最基本用法外,还有表示成功做某事的用法) 二.表示猜测 1.可能 can/could may/might(may/might well do 表示极有可能) must 2.不可能 can’t/could n’t 3.表示猜测的情态动词+have done(对过去已经完成动作的猜测) 三.表示请求 can/could may/might 表示允许 can/could may/might 四.表示建议 should ought to do(应该) had better do(最好) may/might as well do(不妨) 五.表示必须 have to(客观) must(主观) 六.can’t/c ouldn’t和比较级连用表示“再…也不过”,表示肯定 I can’t agree more. That couldn’t be better. It couldn’t be worse. 1.—I’ve taken someone else’s green sweater by mistake. —It _________ Harry’s. He always wears green. A. h as to be B. will be C. mustn’t be D. could be 2.—Do you know where David is? I couldn’t find him anywhere. —Well. He _________have gone far—his coat’s still here. A. shouldn’t B. mustn’t C. can’t D. wouldn’t 3.—Lucy doesn’t mind lending you her dictionary. —She _________. I’ve already borrowed one. A. can’t B. mustn’t C. needn’t D. shouldn’t 4.—Catherine, I have cleaned the room for you. —Thanks. You _________it. I could manage it myself. A. need n’t do B. needn’t have done C. mustn’t do D. shouldn’t have done 5. The fire spread through the hotel very quickly but everyone __get out. A.had to B.would C.could D.was able to 6. —The woman biologist stayed in Africa studying wild animals for 13 years before

情态动词

情态动词(Modal Verbs) 常用的情态动词有can (could),may (might),must,shall (should),will (would),ought to等;半情态动词有have (got ) to,need,be able to,used to,dare,had better(best) 等。 注:有些情态动词可以用作实义动词,如:need,dare等。 首先了解情态动词的基本用法 can, could, be able to can的用法 1、表示能力, 意为“会”,“能”。 例:Is there anything I can do for you? 我能为你做些什么吗? 2、表示允许或请求。 例:---Can I borrow your seal for afternoon? 下午我可以借用一下你的印章吗?---Y es, you can.好,行。---No, Y ou can’t.不,不行。 3、表示建议或请求,语气比较客气。 例:Can I help you? 要我帮你吗?Can you give me a lift to the station? 我可以搭你的便车去车站吗? could 的用法 1、could 是can 的过去式,表示(过去的)能力、许可或允许。 例:She couldn’t walk after the operation because she was too weak. 手术后,她身体太虚弱,不能行走。 2、表示很委婉或客气的请求。 例:Could you show me the way to the zoo? 劳驾能给我指指去动物园的路吗? 3、用在虚拟语气中。 例:I wish I could take back those tactless words. 我希望收回那些不得体的话。 be able to 的用法 be able to 表示“有能力”,“能够”,可用于各种时态。 例:I’ll be able to help you tomorrow. 我明天能够帮你。 may might may 的用法 1、may 表示许可或征求许可, 意为“可以…吗?”。 例:May (might)I park my car in front of your house? 我可以把车停在你的房前吗?(might更委婉) ---May I leave the workshop when I have finished my work? 我干完活儿可以离开车间吗? ---Y es, please. /Sure. /Of course. /Certainly. ---行,请吧。/当然可以。---No, you can’t. /No, you mustn’t. 不,不可以。/不,不行。 2、may有时可以表示祝愿。 例:May you succeed. 祝你成功。May you have a good time. 祝你玩得愉快。 might的用法

情态动词用法归纳

情态动词(Modal Verbs ) * 情态动词也可称为“情态助动词(Modal Auxiliaries)”,因为它和基本助动词(be,do, have)都属于助动词类。 * 情态动词和其他动词连用,可表示说话人的语气。 * 情态动词可表达建议、要求、可能和意愿等。 * 情态动词没有人称和数的变化。 * 常用的情态动词有:can, could, may, might, must, shall, should, will, would这九大情态动词;其他的还有ought to, need, dare 等。 一、九大情态动词的时态关系: 1. 现在式can -- 过去式could 2. 现在式may -- 过去式might 3. 现在式shall -- 过去式should 4. 现在式will -- 过去式would 5. 现在式must -- 过去式must (常用had to来代替) 二、情态动词表示“可能”或“预测” (can, could, will, would, shall, should, must, ought to) (1)can 和could 用于表示“可能”或“预测”: 1. He can't be at home. (否定句) 他不可能在家。 2. Can the news be true ? (将情态动词can 置于主语the news 前就成疑问句) 这消息可能是真的吗? 3. Anybody can make mistake. (只表示理论上的可能性) 任何人都可能犯错误。 (2)may 和might 用于表示“事实上的可能性”或“预测”: 1. It may rain tomorrow. (表示可能会发生) 明天可能会下雨。 2. It may snow later this afternoon. (表示预测) 今天下午可能会下雪。 3. You might be right. (表示有可能) 你可能是对的。 (3)will 和would 用于表示“预测”或“习惯性”: 1. I think he will be all right now. (will be 表示一定会) 我想他现在一定好了。 2. That would be his mother.(would be 表示肯定是) 那肯定是他母亲。 3. He will sit there hour after hour looking at the river.(will 表示经常的) 他经常一连几个小时坐在那儿看着河水。 (4)shall 和should 用于表示“会是,应该是”: 1. I shall be rich one day. (shall be ) 总有一天我会发财的。 2. That should be Sam and his mother. (should be) 那应该是Sam 和他的母亲。 (5)must 用于表示“必定”,“必会”: 1. This must be good for you.(must be 肯定)

情态动词知识点总结

情态动词知识点总结 情态动词是英语中的一类特殊动词,用于表达说话人的态度、观点 或情感。情态动词具有一些独特的语法和用法规则,掌握了这些规则,我们就能更准确地表达自己的意思。本文将对情态动词的知识点进行 总结,以帮助读者加深对该语法现象的理解。 一、情态动词的定义和特点 情态动词(modal verbs)是英语中的一类特殊动词,用于表示说话 人的意愿、可能性、许可、推测、建议、命令等情态。情态动词有一 些独特的特点: 1. 情态动词没有人称和数的变化。即不论主语是什么,情态动词的 形式都保持不变。 2. 情态动词后面接动词原形(除了 ought to 外)。 3. 情态动词本身没有时态和语态的变化,通过与其他动词的搭配来 表达时态和语态。 4. 情态动词不能单独用作谓语,必须与其他动词搭配使用。 二、常见的情态动词及其用法 下面是常见的情态动词及其用法的详细介绍: 1. can 表示能力、许可或可能性。例如:

- I can swim.(我会游泳。) - Can I borrow your pen?(我能借用你的笔吗?) - It can be difficult to learn a new language.(学习一门新语言可能会 很困难。) 2. could 表示过去或虚拟的能力、许可或可能性。例如: - When I was young, I could run very fast.(当我年轻的时候,我跑得 很快。) - If I had more time, I could study abroad.(如果我有更多时间,我可 以出国留学。) - Could you help me with this problem?(你能帮我解决这个问题吗?) 3. may 表示可能性、许可或问询。例如: - It may rain tomorrow.(明天可能会下雨。) - May I use your phone?(我可以用一下你的手机吗?) - May I ask you a question?(我可以问你一个问题吗?) 4. might 表示可能性,用法与 may 相似。例如:

虚拟语气的形式与意义详解

虚拟语气的形式与意义详解 虚拟语气的形式与意义详解 想要学好英语怎么能不知道虚拟语气的形式与意义呢?下面就让店铺为大家详解一下吧。 情态动词(Modal Verbs)是说话人用来表示说话的语气,包括叙述、命令、要求、愿望及不可能的假设。如果是叙述,就是叙事语气。命令或要求,就是祈使语气;愿望或不可能的假设,就是虚拟语气。 这里就来说虚拟语气的形式及其意义。 虚拟语气可分三种如下: 一、纯虚拟 (形式和意义都属虚拟。) 首先,可用条件副词分句来表示一种不是真实性的假设,如: (1) If l were you, l would not do such a thing. 这里的过去时态“were”表示现在的事件、现在的愿望。 接着,也可用名词从句表示一种不能实现的愿望如: (2) I wish l could do something for you. 这里的过去时态“could do”表示的'是现在的事件、现在的愿望。 (3) I wish l had not made such a decision. 这里的过去完成时态“had not made”表示过去的事件,现在的愿望。 此外,还可用由“as if”引导的副词从句表示不是真实的事,如: (4) The tired worker walked as if he had been drunk. 最后,可用“but for”或“without”引导的简单句表示不可能的事,如: (5) But for the heavy rain(要不是这阵大雨),we would have done the work. (6) Animals could hardly breathe without air. 注意,这种虚拟句里的动词时态,异乎寻常。 二、半虚拟

高中英语情态动词变形规则总汇

高中英语情态动词变形规则总汇 1. 情态动词(Modal Verbs)是一类特殊的助动词,用于表示说话人对某种行为、状态或意愿的态度、推测、能力、可能性等。情 态动词有一些变形规则需要注意。 2. can/could - Can用于表示能力、允许、许可等,表示现在或将来的情况;could用于表示过去的情况。 - can和could的否定形式为can't/cannot和couldn't。 - can/could没有第三人称单数的形式,也不加-s。 3. may/might - May用于表示许可、推测、可能性等;might表示过去或未来的推测、可能性等。 - may和might的否定形式为may not/might not。 - may/might没有第三人称单数的形式,也不加-s。

4. must - Must用于表示肯定、必须、推测等。 - must的否定形式为must not或mustn't。 - must没有第三人称单数的形式,也不加-s。 5. shall/should - Shall用于表示将来、意愿、建议等;should表示应该、建议等。 - shall和should的否定形式为shall not/should not。 - shall/should没有第三人称单数的形式,也不加-s。 6. will/would - Will用于表示将来、意愿等;would用于表示过去的意愿、惯常的动作等。 - will和would的否定形式为will not/won't和would not/wouldn't。 - will/would没有第三人称单数的形式,也不加-s。

情态动词的用法小结

情态动词的几点用法 情态动词(Modal Verbs),又称为情态助动词(Modal Auxiliaries),与实义动词连用表示说话人的语气,可表达建议、要求、可能、意愿等。常用情态动词列表如下: 情态动词没有人称和数的变化,即第三人称单数后的情态动词不加s。此外,情态动词的过去式多数情况下只表示语气,而不表示时间。 情态动词的用法很多,很繁琐。现就其几点重要的用法进行分析总结。 一、表示猜测 例如: A: (Pointing to a person standing far away) Who can / could it be? 肯定回答B: It might be teacher Li. 那可能是李老师。(语气很不肯定) 或It may be teacher Li. 那可能是李老师。(语气有点不肯定) 或It must be teacher Li. 那一定是李老师。(语气非常肯定) 否定回答B: It might not be teacher Li. 那可能不是李老师。(语气最弱) 或It may not be teacher Li. Teacher Li is not so tall. 那可能不是李老师,李老师没有那么高。(语气较弱) 或It couldn’t be teacher Li. Teacher Li was in the office just now.那不可能是李老师,李老师刚才还在办公室。(语气较强) 或It can’t be teacher Li. Teacher Li has gone abroad.那不可能是李老师,李老师出国了。(语气最强)

英语情态动词笔记

情态动词 情态动词(Modal verbs)本身有一定的词义,表示语气的单词。但是不能独立作谓语,只能和动词原形一起构成谓语。情态动词用在行为动词前,表示说话人对这一动作或状态的看法或主观设想。 情态动词是时表词 情态动词后加动词原型 情态动词(一) 1、【情态动词】 1、can could 2、will would 3、may might 4、must have to 5、shall should ought to be supposed to do 6、need dare 2、【can/could】 1、能力 could 是can的过去式 例句:Can you speak English? 你会说英语吗?有说英语的能力吗? Could you speak English?(以前) 2、许可 could 比can 更委婉 例句:Can you speak English? 你可以说英语吗?本身是会说英语的 Could you speak English?(语气更委婉) 3、推测 can不能用于肯定句,could均可以用 【知识点】四种句型:肯定句、否定句、一般疑问句、特殊疑问句 can有两种情况下可用于肯定句:①理论上不可能而实际有可能时 例句:经验丰富的老师也可能会犯错:Experienced teachers can also make mistakes.

①can加only时 例句:他只可能是我的老师:He can only be my teacher 4、有时 can+be/get 例句:北京夏天有时候很冷:Beijing can be very cold in summer 5惊讶,怀疑 例句:你怎么能是个老师呢?:How can you be a teacher? 3、【will/would】 1、将要区别be going to(准备、计划)、will(会进行的动作) would是will的过去时 区别be going to(准备、计划、将要)、will(会,执行动作的结果) 例句:我会完成这件事情的I will finish this thing. 我准备完成这件事情I am going to finish this thing. 2、提出建议或请求 would比will更委婉 例句:你能关一下门吗?:Will/Would you close the door 3、would like 是由want和like变时表词而来 【知识点】情态动词是时表词 Do you want/like a cup of coffee?do 变为would Would you want/like a cup of coffee? 4、过去或现在的习惯,倾向性will现在,would过去 例句:我现在习惯晚上跑步:I will run at night 我以前习惯晚上跑步:I would run at night 4、【may/might】 1、允许 表请求允许时,只能用在第一人称疑问句中,might比may更委婉; 表给予允许时,只能用在第二三人陈述句中,只能用may。 例句:我可以进来吗?:May/Might i come in? 2、推测 may不能用于疑问句句首,也就是不能用于一般疑问句,might比may的可能性更小,如果想变大,加well,表示加强语气。 例句:他什么时候可以完成作业when may/might he finish his homework?

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