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情态动词语法

英语语法大全--情态动词

1 情态动词的语法特征

1）情态动词不能表示正在发生或已经发生的事情，只表示期待或估计某事的发生。

2）情态动词除ought 和have 外，后面只能接不带to 的不定式。

3）情态动词没有人称，数的变化，即情态动词第三人称单数不加-s。

4）情态动词没有非谓语形式，即没有不定式，分词，等形式。

2 比较can 和be able to

1）can could 表示能力；可能(过去时用could),

只用于现在式和过去式(could)。be able to可以用于各种时态。

They will be able to tell you the news soon. 他很快就能告诉你消息了。

2）只用be able to

a. 位于助动词后。

b. 情态动词后。

c. 表示过去某时刻动作时。

d. 用于句首表示条件。

e. 表示成功地做了某事时，只能用was/were able to，不能用could。

He was able to flee Europe before the war broke out.

= He managed to flee Europe before the war broke out.

注意：could不表示时态

1）提出委婉的请求，（注意在回答中不可用could）。

--- Could I have the television on?

--- Yes, you can. / No, you can't.

2）在否定，疑问句中表示推测或怀疑。

He couldn't be a bad man.

他不大可能是坏人。

3 比较may和might

1）表示允许或请求；表示没有把握的推测；may 放在句首，表示祝愿。

May God bless you!

He might be at home.

注意：might 表示推测时，不表示时态。只是可能性比may 小。

2）成语：may/might as well，后面接不带to 的不定式，意为"不妨"。

If that is the case, we may as well try.

典型例题

Peter ___come with us tonight, but he isn't very sure yet.

A. must

B. may

C. can

D. will

答案B. 表可能性只能用may.此句意可从后半句推出。

4 比较have to和must

1)两词都是'必须'的意思，have to 表示客观的需要，must 表示说话人主观上的看法，既主观上的必要。

My brother was very ill, so I had to call the doctor in the middle of the night.

我弟弟病得很厉害，我只得半夜里把医生请来。(客观上需要做这件事) He said that they must work hard. 他说他们必须努力工作。（主观上要做这件事）

2)have to有人称、数、时态的变化，而must只有一种形式。但must 可用于间接引语中表示过去的必要或义务。

He had to look after his sister yesterday.

3）在否定结构中：don't have to表示"不必"

mustn't表示"禁止"，

You don't have to

tell him about it.你不一定要把此事告诉他。

You mustn't tell him about it.你一定不要把这件事告诉他。

5 must表示推测

1) must用在肯定句中表示较有把握的推测，意为"一定"。

2) must表对现在的状态或现在正发生的事情的推测时，must 后面通常接系动词be 的原形或行为动词的进行式。

You have worked hard all day.You must be tired.你辛苦干一整天，一定累了。（对现在情况的推测判断）

He must be working in his office. 他一定在办公室工作呢。

比较：

He must be staying there.

他现在肯定呆在那里。

He must stay there.

他必须呆在那。

3) must 表示对已发生的事情的推测时，must 要接完成式。

I didn't hear the phone. I must have been asleep.我刚才没有听到电话，我想必是睡着了。

4) must表示对过去某时正发生的事情的推测，must 后面要接不定式的完成进行式。

---Why didn't you answer my phone call?

---Well, I must have been sleeping, so I didn't hear it.

5) 否定推测用can't。

If Tom didn't leave here until five o'clock, he can't be home yet.如果汤姆五点才离开这儿，他此时一定还未到家。

6 表示推测的用法

can, could, may, might, must 皆可表示推测，其用法如下：

1）情态动词+动词原形。

表示对现在或将来的情况的推测，此时动词通常为系动词。

I don't know where she is, she may be in Wuhan.

2）情态动词+动词现在进行时。

表示对现在或将来正在进行的情况进行推测。

At this moment, our teacher must be correcting our exam papers.

这时，我们老师想必在批改试卷。

3）情态动词+动词完成时。

表示对过去情况的推测。

We would have finished this work by the end of next December.

明年十二月底前我们很可能已完成这项工作了。

The road is wet. It must have rained last night.

地是湿的，昨天晚上一定下雨了。

4）情态动词+动词的现在完成进行时。

表示对过去正在发生事情的推测。

Your mother must have been looking for you.

你妈妈一定一直在找你。

5）推测的否定形式，疑问形式用can't, couldn't表示。

Mike can't have found his car, for he came to work by bus this morning.

迈克一定还没有找回他的车，因为早上他是坐公共汽车来上班的。

注意：could, might表示推测时不表示时态，其推测的程度不如can, may。

语法知识—情态动词的知识点总复习附解析

一、选择题 1．It is 11:00 p.m now. Peter hasn't come back yet. His mother ______ be very mad at him. A．may B．can C．must D．need 2．—Have you heard about the temperature of the earth will rise to 59℃ in 2020?—Don’t worry! The news _______ be true. A．must not B．may not C．needn’t D．will not 3．-Listen! A wolf is crying! -It _______ be a wolf, because a wolf never comes out at this time. A．mustn’t B．needn’t C．can’t D．don’t 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．---Mum, must I finish my homework today? ---No, you . Tomorrow is Sunday and you may have a rest today. A．shouldn’t B．mustn’t C．can’t D．don’t have to 6．You look quite tired. You'd better ________ a good rest. A．stop to have B．stop having C．to stop to have D．to stop having 7．—Tom, we’re going shopping at eight, right? —Yeah, but I ______ be a little late, so don’t wait for me. A．may B．should C．mustn’t 8．You should________ the teacher________being late for school. A．apology to, about B．apologize to, for C．apologies to, for D．apologize to, on 9．—Can you come to my party on Saturday afternoon? —Sorry, I can’t. I ________ meet my friends. A．can’t B．might have to C．needn’t 10．— I wonder if these are Jim's glasses. —They _____his. He doesn't wear glasses. A．might be B．could be C．can't be 11．—The book report is very important. You ________ write it carefully. —But I ________ hand it in now. A．must; must B．have to; must C．must; have to D．have to; have to 12．Even the top student can't work out this problem, so it________ be too difficult. A．must B．may C．can D．need 13．—________ I borrow the books from the library, Miss Yang? —Sorry, you________. These books are only for members of the English Club. A．Can; couldn’t B．Could; can’t C．Could; could n’t D．Can; needn’t

情态动词大学英语语法精解

大学英语语法精解——情态动词首先让我们分析以下近几年情态动词的考题： 1) This box is too heavy, _________give me a hand?(1998.1) A .would you mind B. would you please C. will you like to D. will you please to 2) Research findings show we spend about two hours dreaming every night , no matter what we ____ during the day.(1999.1) A. should have done B. would have done C. may have done D. must have done 3)It was very kind of you to do the washing-up,but you____ it.(1998.6) A. mustn't have done B. wouldn't have done C. mightn't have done D. didn't have to do 4) If you don't like to swim, you ___ stay at home.(1995.1) A. should as well B. may as well C. can as well D. would as well 5) You ____ him so closely;you should have kept your distance.(2000.6) A. shouldn't follow B. mustn't follow C. couldn't have been following D. shouldn't have been following 6) You ___her in her office last Friday; she's been out of town for two weeks.(1996.1) A. needn't have seen B. must have seen C. might have seen D. can't have seen 7) The room is in a terrible mess; it ____ cleaned.(1996.6) A. can't have been B. shouldn't have been C. mustn't have been D. wouldn't have been 参考答案 1) B 2) C 3) D 4) B 5) D 6) C 7) A 2．情态动词的测试要点从以上例题可以看出，四级语法对情态动词的测试大体有以下几点。 1）情态动词的基本用法，如①④⑤。 2）情态动词+ 动词的完成形式的用法，如③⑥。 3）情态动词的推测性用法,如⑦。

初中英语语法大全知识点总结

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(完整版)必修三unit2语法讲解情态动词用法

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初中英语语法知识—情态动词的全集汇编及答案(3)

一、选择题 1．— Must I go home? — No, you ________. A．can’t B．mustn’t C．don’t D．needn’t 2．-Listen! A wolf is crying! -It _______ be a wolf, because a wolf never comes out at this time. A．mustn’t B．needn’t C．can’t D．don’t 3．A: Is Jim coming by train? B: I’m not sure. He _______ drive his car. A．must B．may C．need D．should 4．From March 23rd, 2013, anyone under the age of 14 ________ go into Disneyland alone. A．couldn’t B．mustn’t C．needn’t D．mightn’t 5．—______ you please tell me something about the life in Canada or America?—Sorry, I______. I don’t know either. I’m from Australia. A．Could; couldn’t B．Can; couldn’t C．Could; can’t D．Can; mustn’t 6．—Jenny, we buy Mom presents. We can clean the house from top to bottom.—Good idea! It’s a special present for Mother’s Day. A．can’t B．mustn’t C．shouldn’t D．needn’t 7．— 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 8．—Jack must be in his office, I think. —No, he be in the office. He flew to Canada this morning. A．needn't B．shouldn't C．can't D．mustn't 9．Since the road is muddy,it ________last night, ________? A．must be rained; wasn’t it B．must have rained; didn’t it C．must rained; didn’t it D．must have rained; wasn’t it 10．—Have you heard about the temperature of the earth will rise to 59℃ in 2020?—Don’t worry! The news _______ be true. A．must not B．may not C．needn’t D．will not 11．-_________ you help me with my homework? -Of course if I __________. A．Could; could B．Can't; can C．Could; can D．Can; could 12．—Must we finish the work right now? —No, you ________. You can do it tomorrow. A．needn’t B．shouldn’t C．mustn’t D．can’t 13．— Will Jim come to Yangzhou for a holiday? — He ________come, it depends on how much homework he will have.

语法知识—情态动词的全集汇编附答案

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初中英语语法知识—情态动词的图文答案(3)

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初中英语语法——句子成分精讲

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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

英语情态动词语法知识及英语提分方法

英语《情态动词》语法知识及英语提分方法情态动词一、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。（4）过去时：could表示一般能力，was/were able to 表示在具体场合通过努力成功做成某事的能力。二、may 和might 1、may的用法（1）表示询问或说明一件事可不可以做。（2）表示一件事或许会发生或某种情况可能会存在，通常用在肯定句和否定句中。注意：表示可能性时，can’t语气强，表示“不可能”，may not语气弱，表示“可能不”。 2、might的用法（1）表示询问或允许，指的是过去时间。（2）表示可能发生的事，可以指过去时间，也可以指现在时间，语气更加不肯定，可能性比may小一些。 3、may与might的特殊用法（1）“may+主语+动词原形”表示祝愿。（2）“may/ might well+动词原形”表示（完全）能，很可能。（3）“may/ might as well+动词原形”表示最好，满可以，倒不如。（4）may be 是“情态动词+系动词be”结构，表示“可能有，可能在”，否定式为may not be。 maybe是一个词，为副词，意为“大概，或许，可能”，在句中作状语。

初中英语语法知识点总结-句子的基本结构

3)表延续的动词: remain, keep, hold, stay, rest等。 5、定语：对名词或代词起修饰、限定作用的词、短语或句子。 The black bike is mine.（形容词） The boy in blue is Jim.（介词短语） I have nothing to do today.（动词不定式）注意：1) 当定语修饰不定代词如：nothing , anything , everything , something等时，定语要放在其后作后置定语。例如： I tell him something interesting. 2) 不定式、短语或从句作定语时，也放在被修饰的名词之后。例如：The boys who are in the room are playing games. 6、状语：用以修饰adj. /v. /adv.及全句，位置灵活。 1、修饰形容词或副词时，通常位于被修饰的词之前； I am very sorry. 2、表示时间、地点、目的的状语一般位于句子两头，强调时放在句首。In order to cheer him up, I told him the truth. They are writing English in the classroom. 3、一些表示不确定时间（如：often）或程度（如：almost）的副词状语通常位于be动词、助动词、情态动词之后，动词之前。 We often help him.

He is always late for class. 7、补语：补充说明宾语的情况。由n./adj./介宾/分词/不定式等担任。常位于宾语后。 He made me sad.（形容词） She asks me to take an umbrella.（不定式） The war made him a soldier.（名词） I find him at home.（介词短语） I saw a cat running along the wall.（分词） 8、同位语：同位语是句子成分的一种, 它位于名词、代词后面, 说明它们的性质和情况, 它可以由名词、代词、名词性短语或从句充当。Tom, our monitor, is a handsome boy. I myself will do the experiment. She is the oldest among them six. 一）. 简单句五种基本句型：句子包含主要句子成分(主语、谓语)和次要句子成分(表语、宾语、宾语补足语),按照动词的性质将英语简单句划分为以下五种基本句型：1、基本句型的词序：

英语情态动词的用法大全附解析

英语情态动词的用法大全附解析一、初中英语情态动词 1．—We've got everything ready for the picnic. —Do you mean I __________ bring anything with me? A. can't B. mustn't C. couldn't D. needn't 【答案】 D 【解析】【分析】句意：—我们已经为野餐准备好了一切。—你的意思是我不必带任何东西吗？A. can't 不能；B. mustn't 表示禁止，一定不要；C. couldn't不能，表示过去时态；D. needn't不必。结合句意，故选D。【点评】本题考查情态动词的用法。 2．—How amazing this robot is! —Wow, it has video cameras in its eyes, so it “see” and interact with pe ople. A. may B. can C. must D. should 【答案】 B 【解析】【分析】句意：—这个机器人多么惊人啊！—哇，在它的眼睛里有摄像机，因此它能看见和人打交道。A. may 可以，可能；表示许可，B. can 能；表示能力，C. must 必须；D. should应该；根据it has video cameras in its eyes,可知是有能力看见，故选B。【点评】考查情态动词辨析。熟记情态动词的含义和用法。 3．—Where is George? —He _______ be here just now. His coffee is still warm. A. need B. can't C. must D. shouldn't 【答案】 C 【解析】【分析】句意：——乔治在哪里？——他刚才一定在这里，他的咖啡还是热的。A. need需要； B. can't 不能，不可能（表示推测）； C. must 必须，一定（表示推测）； D. shouldn't不应该；根据His coffee is still warm.可知表示肯定推测一定在这儿；故答案为C。【点评】考查情态动词。掌握情态动词表推测时的意义和用法。 4．— Sorry, I forgot to take money with me. Maybe I can't buy the book you like. — Mum, you ______ worry about it. We can pay by Alipay （支付宝）. A. can't B. needn't C. mustn't D. shouldn't 【答案】 B 【解析】【分析】句意：——对不起，我忘记带钱了。也许我不能买你喜欢的书。——妈妈，你不用担心。我们可以用支付宝支付。A. can't不能，指不允许或否定推测；B. needn't 不需，指没必要；C. mustn't不能，表禁止；D. shouldn't不应该，表建议。根据句意语境，本句是说妈妈不需要担心，故答案为B。【点评】考查情态动词。理解句意并掌握情态动词的意义和用法区别。

初中英语语法情态动词用法大全

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。情态动词句和疑问句中表示请求，允许，意为“能够” could 是can 的过去式，意为“能、会”，表示过去的水平在疑问句中表示委婉请求 may 表示请求、许可，意为“能够”表示推测，常用于肯定句中，意为“可能、也许” might 是may的过去式,表推测，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”表有把握的推测，用语肯定句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、行为考点一情态动词知识清单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。 1. can 的用法（1）表示水平、许可、可能性。表示水平时一般译为“能、会”，即有种水平，尤其是生来具备的水平，此时may 和must 均不可代替它。（2）表示可能、能够。如：I can finish it in an hour. （3）表示许可，常在口语中。如：You can use my dictionary. （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”。 2.could的用法（1）can的过去式，意为“能、会”，表示过去的水平。（2）could 在疑问句中，表示委婉的语气，此时没有过去式的意思。 3.may的用法（1）表示请求、许可，比can 正式，（2）表示推测，谈论可能性，意为“可能，或许”，一般用于肯定句中。（3）may的过去式为might ，表示推测时。可能性低于may 。 4. must的用法（1）must 表示主观看法，意为“必须、一定”。（2）其否定形式mustn’t表示“一定不要”“千万别”“禁止, 不许”.（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 . （4）must 表示有把握的推测，用于肯定句。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。 She must have finished writing, hasn’t she? 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? ----Yes, you must .-----No. you needn’t . (2) need 还能够作实义动词，此时有人称、数和时态的变化，后边多接动词不定式。 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。（2）dare 作为实义动词，此时有人称、数即时态的变化。注意：在口语中，dare 的各种形式常与不带to 的不定式连用。Do you dare tell her what I said? 7. shall 的用法（1）shall 表示征求对方意见（多用于第一、三人称）， Shall we go out for a walk? （2）表示决心、警告、命令（多用于第二、三人称）， No one shall bring your beepers or mobile phones in the exam. 8. should的用法（1） should 意为“应该”，可表示劝告、建议、义务、责任等。We should protect the environment. （2） should (would)like to do sth. 表示“想要、愿意做某事”，常用于口语中。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。 You should have finished your homework. 9. will 的用法 will表示意愿、意志、打算，可用于多种人称。 I will help you if I’m free this afternoon. 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。 We had better go now. You had better not give the book to him. 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? Could he be a good student? May I borrow your ruler?Must we clean the room now? （2）对may 引出的问句，能够有下列回答方式：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。Would you show me your picture book? Will you please give me a call? （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. （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。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，He can’t be ill. He is playing chess with Tom.（3）can’t还可用来回答“ May I …?”这样的问句。May I come in ?No, you mustn’t. / can’t.（4）can’t还可用于固定习语中。She can’t help crying. 2.may 的否定式为may not ，译成“可能不”，He may not be at home. 3.（1）mustn’t表示不许，不可。He mustn’t leave his room.