(完整word版)情态动词讲解及练习题

完整版英语情态动词用法详解含答案一、选择题1．— Mom, must I clean my room now?— No, you ________. You can do it after dinner.A．needn’t B．mustn’t C．shouldn’t D．can’t2．To my joy, we_________ go to the bank. Mary has lent us some money.A．shouldn’t B．needn’t C．couldn’t D．would n’t3．It’s of great importance to protect the environment. Each of us ________ take an active part in it.A．can B．may C．would D．should4．—Do we have to finish this today?—Yes, you ________ . Today is the last day.A．would B．may C．can D．must 5．—Hurry up, J ack! Let’s cross the road as fast as possible.—No, you ________. Don’t you see the light is still red?A．couldn’t B．wouldn’t C．mustn’t D．needn’t6．—Be careful! Fire ________ be dangerous sometimes.—OK. I will put it out right away.A．mustn’t B．should C．can D．needn’t 7．—Will my car be ready by the end of the day?—It ________ be, sir. I’ll call if there’s any problem.A．must B．could C．shall D．should 8．—Dad, must we wait until the light becomes green?—Yes, I am afraid we ________. That’s the traffic rule.A．may B．can C．have to D．need9．—________ you give me a hand? I can’t put up the poster by myself.—No problem.A．Could B．Should C．Need D．Must10．— Is Lang Lang going to perform at Art Center this Friday?— Yes. It ________ be him. He has been here for three days.A．might B．must C．mustn’t D．may11．You'd better __________ hard from now on, __________ you will fail the exam. A．work; and B．working; or C．working; and D．work; or 12．We teenagers ________ have dreams. With dreams and hard work, anything amazing________ be created.A．may; can B．might; should C．should; can D．must; has to 13．I ________ hear you clearly. Would you please repeat it?A．mustn’t B．can’t C．needn’t D．shouldn’t 14．You ________ drive after drinking alcohol(酒). It’s against the law.A．mustn’t B．needn’t C．couldn’t D．wouldn’t15．It’s amazing that the pen ________turn voice into text with few mistakes.A．can B．must C．may D．need16．If you buy your mum an iRobot floor cleaner, she ________ sweep the floor every day. A．can’t B．mustn’t C．needn’t D．s houldn’t 17．The boy is very brave．I ________ he ________ the tall tree．A．dare say; dares to climbB．dare to say; dare climbingC．dare saying; dares climbD．dare to say; dares climbed18．—The high school entrance examination is coming!—Yes, our teacher tells us we _______ be too careful while taking exams．A．mustn't B．shouldn't C．needn't D．can't19．---Will you be back early this evening?---Yes, but I ________ be a little late. Our boss sometimes has extra work for us.A．may B．must C．need D．will20．We’ve d iscussed every detail of this plan and have got everything ready. But still something __________ go wrong. We still have to be very careful.A．must B．should C．would D．may21．You ______ pay too much attention to your pronunciation, as it is so important in the oral （口头的） test.A．shouldn’t B．mustn’t C．can’t D．needn’t 22．—Will your mother be at home this Saturday?—Hard to say. She _______go to the countryside to see my grandparents.A．must B．may C．can D．would 23．Think twice before making a decision, or you __________ get into trouble.A．may B．can't C．shouldn't D．mustn't 24．Don’t cross the road until the traffic lights turn green. A car_______hit you.A．need B．may C．should D．must 25．—Where is Tom? I am considering ________ him about the result of the exam.—Oh. You ________. He has known it already.A．to tell; can't B．telling; needn't C．tell; mustn't D．told; shouldn't 26．—Will Jim come to Yangzhou for a holiday?—He ________come and it depends on how much homework he will have.A．may B．should C．must D．need27．Hurry up, or we ________ miss the beginning of the film.A．should B．must C．may D．have to 28．—How do you like my new dress?—Well, if I ________ say, it is not suitable for you.A．may B．must C．have to D．should29．—Must the children leave at six tomorrow morning?—No, they _______. They can have more time to get ready for the trip.A．can’t B．needn’t C．mustn’t D．may not 30．—Why didn’t you tell it to me earlier?— Why ________ I? I want to have my own secret.A．can B．may C．should D．shall31．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 32．—What is that young lady’s job?—She ________ be a nurse, I’m not sure.A．must B．may C．need D．would 33．According to the rule, used batteries ________ be dropped in the red bin for harmful wastes. A．may B．would C．should D．might34．You _________ smoke here! Look at the sign. It says "No smoking".A．needn't B．mustn't C．can D．may35．—Suzy described every detail of the accident just now.—Her memory ________ be completely back.A．shall B．need C．must D．could36．—Is that Mr Zhou?—It ________ be him. He has gone to Beijing.A．can B．may C．can’t D．shouldn’t 37．—Who’s singing next door? Is it Miss Wang?—It ________ be h er. She’s having the board meeting.A．can’t B．shouldn’t C．mustn’t D．needn’t38．— Mum, why do I have to wash hands so many times a day?—You ________ be too careful, for your health.A．can’t B．mustn’t C．may not D．needn’t39．To avoid ________, we’d better ________ the parents’ meeting online.A．gather; hold B．gathering; hold C．gather; holding D．to gather; to hold 40．I think all the students love the weekends because, to them, they ________ get up early on Saturdays or Sundays.A．mustn’t B．don’t need C．needn’t D．can’t41．—Is it usually warm in Yancheng in May?—Yes. But it _______ be rather cold sometimes.A．must B．should C．would D．can42．—Shall I tell him the change of the time right now?—I’m afraid you ________, otherwise he will be late for the meeting.A．can B．may C．must D．need43．—Will dad arrive home at 6 o’clock to have dinner with us this evening?— I think he will, but he ________ not. Sometimes he works extra hours.A．can B．must C．need D．may 44．—Excuse me. I haven’t finished reading the book yet. M ay I keep it a bit longer?— Sorry, you ________. You must return it on time.A．needn’t B．can’t C．won’t D．shouldn’t 45．Cars ________ give way to walkers on some roads in Binhai, or the drivers will be fined. A．may B．will C．can D．must 46．Sometimes smiles ________ be false, hiding other feelings like anger, fear or worry. A．should B．would C．must D．can 47．—Could you tell me how to renew the library books?—With pleasure. You ________ come to our desk every time. It’s easier to renew them online. A．can’t B．must n’t C．needn’t D．shouldn’t 48．—The article says that a person’s animal sign decides his personality.—You ________ read it for fun, but don’t believe in that.A．can B．must C．shouldn’t D．needn’t49．— What do you think of the show yesterday?— Some of them were really good but others ________ be better.A．will B．must C．need D．can50．Never throw objects from the building. Even a small object ________ cause serious injuries, or death, when dropped from a great height.A．must B．should C．may D．need【参考答案】***试卷处理标记，请不要删除一、选择题1．A解析：A【详解】句意：——妈妈，我现在必须打扫房间吗？——不，不需要。

(完整版)情态动词专项练习含解析一、选择题1．It’s amazing that the pen ________turn voice into text with few mistakes.A．can B．must C．may D．need2．—Will your mother be at home this Saturday?—Hard to say. She _______go to the countryside to see my grandparents.A．must B．may C．can D．would 3．—The high school entrance examination is coming!— Yes, our teacher tells us we ________ be too careful while taking exams.A．mustn’t B．shouldn’t C．needn’t D．can’t 4．—There is a knock at the door.—It ________ be my mom. She always comes back home at this time.A．may B．may not C．must D．can’t5．—Be careful! Fire ________ be dangerous sometimes.—OK. I will put it out right away.A．mustn’t B．should C．can D．needn’t6．We shouldn’t throw any objects from the building. Even a small object ________ cause serious injuries or death, when dropped from a great height.A．must B．should C．may D．need7．—________ you give me a hand? I can’t put up the poster by myself.—No problem.A．Could B．Should C．Need D．Must8．— Is Lang Lang going to perform at Art Center this Friday?— Yes. It ________ be him. He has been here for three days.A．might B．must C．mustn’t D．may9．You ________ require others to do with the problem like you. Everyone has his own way. A．mustn’t B．needn’t C．may not D．shouldn’t 10．A lot of online resources ________ be used either by teachers at school or parents at home. A．can B．should C．need D．must11．To avoid ________, we’d better ________ the parents’ meeting online.A．gather; hold B．gathering; hold C．gather; holding D．to gather; to hold 12．If you buy your mum an iRobot floor cleaner, she ________ sweep the floor every day. A．can’t B．mustn’t C．needn’t D．shouldn’t 13．—Have you decided to take up teaching as career after graduation?—I ________ go abroad for further education instead. But it depends.A．must B．should C．may D．shall14．The boy is very brave．I ________ he ________ the tall tree．A．dare say; dares to climbB．dare to say; dare climbingC．dare saying; dares climbD．dare to say; dares climbed15．We’ve discussed every detail of this plan and have got everything ready. But still something __________ go wrong. We still have to be very careful.A．must B．should C．would D．may16．When I was young, my father ___________ take me to climb the hill which was not far from our house.A．may B．must C．would D．should17．You ______ pay too much attention to your pronunciation, as it is so important in the oral （口头的） test.A．shouldn’t B．mustn’t C．can’t D．needn’t18．My bike was broken yesterday，so I____walk home．A．might B．had to C．must D．could 19．—Would you please________in that way? That’s not safe!—Sorry. I won’t do it any more.A．not driving B．not to drive C．no driving D．not drive 20．You'd better __________ hard from now on, __________ you will fail the exam. A．work; and B．working; or C．working; and D．work; or 21．— The sandstorm in Beijing is so serious this year.— Yes, I wonder when we ________ worry about the air we breathe.A．can’t B．mustn’t C．needn’t D．shouldn’t 22．—What is that young lady’s job?—She ________ be a nurse, I’m not sure.A．must B．may C．need D．would23．—Will Jim come to Yangzhou for a holiday?—He ________come and it depends on how much homework he will have.A．may B．should C．must D．need24．—In China, many parents complain that their children have to stay up late to do the homework.—Don’t worry. The government has realized the problem. I’m sure there ________ be good news soon.A．can B．should C．need D．must25．You ________ pay too much attention to protecting yourself if you plan to go abroad. A．mustn’t B．can’t C．shouldn’t D．needn’t 26．—Will dad arrive home at 6 o’clock to have dinner with us this evening?— I think he will, but he ________ not. Sometimes he works extra hours.A．can B．must C．need D．may27．Look at the floor, Tom! ________ you watch TV while having a meal?A．Should B．Could C．Must D．May 28．—Excuse me. I haven’t finished reading the book yet. May I keep it a bit longer?— Sorry, you ________. You must return it on time.A．needn’t B．can’t C．won’t D．shouldn’t29．—I must go to school today, ________?—No, you ________.You can go as soon as you get well.A．mustn’t I;needn’t B．needn’t I;needn’tC．mustn’t I;mustn’t D．needn’t I;mustn’t30．Mr. Black ________ be at home now. He went abroad on vacation last Friday.A．can’t B．mustn’t C．needn’t D．shouldn’t31．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 32．—The article says that a person’s animal sign decides his personality.—You ________ read it for fun, but don’t b elieve in that.A．can B．must C．shouldn’t D．needn’t 33．—Mum, I bought some strawberries on my way home.—Oh, you’re so sweet. But the strawberries ________ be put into the fridge for freshness. A．must B．can C．may D．need34．—________ I see your ID card? We have to check your personal information.—Sure. Here you are.A．May B．Need C．Should D．Must35．—I think they are enough. We ________ make so many chairs.—I don’t think so. Because nearly a quarter of them need ________.A．don’t need to; mending B．needed; to be mendedC．don’t need; mend D．need; to mend36．We teenagers ________ have dreams. With dreams and hard work, anything amazing________ be created.A．may; can B．might; should C．should; can D．must; has to 37．You ________ be careful with the camera. It costs!A．can B．will C．should D．may38．It’s of great importance to protect the environment. Each of us ________ take an active part in it.A．can B．may C．would D．should 39．Sorry, smoking is not allowed here. If you ________ , you will be fined according to the rules. A．can B．will C．may D．must40．You’ve got an A in the maths test again. You ________ be good at it.A．can B．may C．must D．should【参考答案】一、选择题1．A解析：A【详解】句意：神奇的是，这支笔能把声音转换成文字，而且很少出错。

初中情态动词讲解及练习题情态动词表示语气和态度。

有实际词义，但是没有单复数等词形变化。

后面通常加动词原形中考主要考查can，must，may，need四个情态动词。

除此之外，表示必要性的情态动词还有should，应该，这个语气比must弱，还有易考点：一．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) 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。

二．肯定句中，表示推测，语气最强的是must，但在否定句和疑问句中，表示怀疑，猜测，要用can’t. （mustn’t禁止，不允许，不能用来表推测；can’t 不可能）There is someone knocking the door. It must be Tom.It can’t be Tom in the classroom. Because he is ill and he doesn’t come to school today.三．情态动词的回答1. 以can开头的一般疑问句，其肯定和否定回答分别用：can和can’t。

情态动词的用法（附练习及参考答案）情态动词情态动词有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、情态动词的基本句型肯定句：主语+情态动词+动词原形+......You can sleep here.否定句：主语+情态动词+not+动词原形+......You can’t sleep here.疑问句：情态动词+主语+动词原形+......Can I sleep here.二、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”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 是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 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、行为考点一情态动词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。

三、情态动词的基本用法1. can 的用法（1）表示能力、许可、可能性。

(完整)情态动词专题讲解情态助动词专题训练概说助动词（auxiliary)主要有两类：基本助动词(primary auxiliary）和情态助动词（modal auxiliary）。

基本助动词有三个：do， have和be；情态助动词有十三个：may, might; can, could; will, would； shall， should； must, need， dare， used to, ought to。

上述两类助动词的共同特征是，在协助主动词构成限定动词词组时，具有作用词的功能：1）构成否定式:He didn’t go and neither did she.The meeting might not start until 5 o'clock。

2) 构成疑问式或附加疑问式：Must you leave right now?You have been learning French for 5 years, haven’t you?3) 构成修辞倒装:Nowhere can he obtain any information about his sister。

Hardly had he arrived when she started complaining.4）代替限定动词词组：A: Who can solve this crossword puzzle？B： Tom can.A: Shall I write to him?B： Yes， do.情态助动词的特征基本助动词与情态助动词最主要的区别之一是，基本助动词本身没有词义,而情态助动词则有自己的词义，能表示说话人对有关动作或状态的看法,或表示主观设想：What have you been doing since？（构成完成进行体,本身无词义）I am afraid I must be going. （一定要）You may have read some account of the matter. (或许已经）除此之外，情态助动词还有如下词法和句法特征：1）除ought和used以外，其他情态动词后面只能接不带to的不定式。

情态动词知识点总结及经典习题(含答案)（word）一、初中英语情态动词1．—Look! The woman at the school gate ______be her headmaster.—No, it ______ be her. She is holding a meeting in the office now.A. must; can'tB. must; mustn'tC. can; needn'tD. may; mustn't【答案】 A【解析】【分析】句意：——看！学校门口的那个妇女一定是她的校长。

——不，不可能是她。

第一空，must表示“一定”；空二，根据She is holding a meeting in the office now. 她现在正在办公室开会，可知，不可能是校长，用can't，表示不可能。

故选A。

【点评】考查情态动词辨析。

注意不同情态动词的用法，注意理解句意。

2．—Where is Monica? I can't find her anywhere.—She be in the library. She loves reading books when she is free.A. mustB. needC. 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．— __________I wear a tie to Janet's birthday party?— No,you needn't. But do remember to bring her a present.A. MustB. ShouldC. NeedD. Can【答案】 A【解析】【分析】句意：——我必须戴领带去参加Jane的生日聚会吗？——不，你不必，但是记住给她带个礼物。

情态动词讲解定义：情态动词表示说话人对动作的态度，比如：需要，可能，意愿，猜测或者怀疑等等。

情态动词本身有一定意思，但不完全，不能单独作谓语，必须与动词原形连用。

否定句中，在情态动词后面加not。

情态动词有：must, shall, should, had better 词形无变化can(could), may(might), will(would) 词形有变化need既可以是情态动词，也可以是实义动词，具有双重性。

一、can 表示“能，会”，否定为：can’t = can not = cannot其过去式为：could→couldn’t(1)表示会做某事，有能力做某事。

意思= be able toe.g. He can speak English, but he can’t speak Japanese.= He is able to speak English, but he isn’t able to speak Japanese.I could smile but I couldn’t speak w hen I was 2 months old.= I was able to smile but I wans’t able to speak when I was 2 months old.区别：① can只用于现在时和过去时(could), be able to 可用于各种时态。

e.g. They will be able to tell you the news soon.Mingming has been able to count numbers.② be able to 不与can连用，但可以和其他情态动词或助动词连用。

e.g. He may be able to speak English very well some day in the future.He may can speak…………………………………………………..He can be able to speak……………………………………………..(2)用于征求意见——Can /Could /May /Might I(we) do sth?——Yes, you can/may. / Of course you can.——No(Sorry), you can’t. /mustn’t.注意：①此处的could和might都不表示过去，只是语气上的委婉，不用作回答。

【解析】根据下文could的用法：小学初中英语情态动词详细用法归纳〔含练习及答案〕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.如：Shecanswimfast,butIcan 她’能t.游得很快，但我不能。

Icanseewithmyeyes.我用眼睛看。

could是can的过去式。

表示过去的能力。

beabletodosth.常常指经过努力，花费了时间和劳力之后才能做到某事。

is/am/areabletodosthwas/wereabletodosth.2〕.表示许可，常在口语中。

如：Youcanusemydictionary.你可以用我的字典。

〔3〕.表示推测，可能性，意为“可能〞，常用于否认句和疑问句中，此时can’t译为“不可能〞。

如：Canthenewsbetrue?这个消息会是真的吗？—Canitbeourteacher?那个人有可能是我们老师吗？—No,itcan’tbeourteacher.HeisonavisittotheGreatWall不可.能。

咱们老师正在游览长城呢。

【例题】—IthinkMissGaomustbeinthelibrary.Shesaidshewouldgothere. —No.She__bethere,I havejustbeenthere. ’’’’t“我刚去过那儿〞可知，应为“不可能〞，can’t表示推测[答案]A1〕.can的过去式，意为“能、会〞，表示过去的能力。

如：Hecouldwritepoemswhenhewas10.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。

情态动词讲解和练习题（含答案）高中英语——情态动词一、考点、热点回顾情态动词的用法1. can 用法1）表示能力，与be able to同义，但can只用于现在时和过去时，be able to可用于各种时态。

Two eyes can see more than one.注：Can you …? Yes, I can / No,I can’t.2).表示允许、请求用could比can 语气更加委婉客气，常用于could I /you …..?句型中，若表示同意时，用can回答而不用could .Could I borrow the book ? No, you can’t .3）表示推测“可能”常用于否定句或疑问句中。

（can’t表示一定不是）It can’t be true .Can it be true ?2. may 用法1）表允许，请求= can表示许可或征求对方的许可，常于第一人称连用。

注：May I ….? Yes ,you may No, you can’t / mustn’t .在回答以may引起的问句时，多避免用这个词，而用其它方式，如Yes, please. / Certainly.2）表推测，可能、也许。

常用于肯定句中。

Maybe he knows the news .=He _____ _____ the news.3. must1）表示义务。

意为“必须”（主观意志）。

We must do everything step by step.注：Must I ….? Yes, you must / No,you needn’t(don’t haveto ).--Must we hand in our exercise—books now?--No, you needn’t. / No, you don’t have to.2）mustn’t 表禁止、不允许。

You mustn’t talk to her like that.3）表示揣测。

一、情态动词主要用来表示说话人的看法、态度等1. can (could)1) 表示能力，could主要指过去时间。

例如：① Two eyes can see more than one. 两只眼比一只眼看得清。

② Could the girl read before she went to school? 这女孩上学前能识字吗？因为can不能和其他助动词连用，所以表示将来式时用will be able to例：You will be able to skate after you have practiced it two or three times.注意：Can表示一贯的能力，be able to表示客观能力和通过努力可以达到的能力I can’t swim. But I am sure I will be able to swim through more practicing.The fire spread through the hotel, but everyone was able to get out2) 表示允许。

例如：① Can I have a look at your new pen? 我可以看一看你的新钢笔吗？② He asked whether he could take the book out of the reading—room. 他问他可不可以把书带出阅览室。

3) 表惊异、怀疑、不相信等态度。

主要用于否定句、疑问句或感叹句中。

例如：① Where can (could) they have gone to? 他们会去哪儿了呢？② How can you be so careless? 你怎么这么粗心？4) 比较委婉客气地提出问题或陈述看法。

例如：① Can (Could) you lend me a hand? 帮我一把好吗？.② I’m afraid we couldn’t give you an answer today. 恐怕我们今天不能给你答复。

情态动词考点解析（Word版附答案）一、初中英语情态动词1．—Must I clean the classroom now? —No, you_______.A. mustn'tB. can'tC. 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 George?—He _______ be here just now. His coffee is still warm.A. needB. can'tC. mustD. 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。

3．According to the law, traffic keep to the left in England.A. mayB. mustC. needD. can【答案】 B【解析】【分析】句意：根据法律规定，在英国车辆必须靠左形式。

A.may可以，表示允许；B.must必须，表示要求；C.need需要，表示必要性；D.can能，表示能力。

根据According to the law,可知法律的要求，应是必须的，应用must，故答案为B。

【点评】考查情态动词。

掌握情态动词的常用法。

4．— __________I wear a tie to Janet's birthday party?— No,you needn't. But do remember to bring her a present.A. MustB. ShouldC. NeedD. Can【答案】 A【解析】【分析】句意：——我必须戴领带去参加Jane的生日聚会吗？——不，你不必，但是记住给她带个礼物。

大学英语情态动词完整详细版附练习题情态动词概述情态动词是英语中一类特殊的动词，用于表达说话人的意愿、能力、推测、建议、许可等。

常见的情态动词有 "can"、"could"、"may"、"might"、"shall"、"should"、"will"、"would"、"must" 等。

以下是对每个情态动词的详细解释和用法：1. Can 表示能力、许可或请求。

例如：Can表示能力、许可或请求。

例如：- I can swim.（我会游泳。

）- Can I use your pen?（我可以用你的钢笔吗？）2. Could 过去式形式的 "can"，表示能力、请求或礼貌的请求。

例如：Could过去式形式的"can"，表示能力、请求或礼貌的请求。

例如：- I could ride a bike when I was five.（我五岁时就会骑自行车了。

）- Could you please open the window?（可以请你打开窗户吗？）3. May 表示许可或推测。

例如：May表示许可或推测。

例如：- May I go to the bathroom?（我可以去洗手间吗？）- It may rain tomorrow.（明天可能会下雨。

）4. Might 过去式形式的"may"，表示推测或可能性较小。

例如：Might过去式形式的 "may"，表示推测或可能性较小。

例如：- I thought it might be too late.（我想可能太晚了。

）5. Shall 表示将来时态的意愿、建议或命令。

例如：Shall表示将来时态的意愿、建议或命令。

情态动词讲解及练习一、can和could特别说明：（1）could用来表示请求时，语气委婉，主要用于疑问句，不能用于肯定句，答语应用can（即：could不能用于现在时态的简略答语中）。

如：——Could I use your dictionary?——Yes, you can.(否定回答可用：No, I’m afraid not.)(2)can和be able to辨析can(could)和be able to都可以表示能力，意思上没有区别。

但can只有现在式和过去式，而be able to则有更多的形式。

如：I’ve always wanted to able to speak fluent English.Those bags look really heavy, are you sure you’ll be able to carry them on your own?但是，表示在过去某时的某一场合经过一番努力，终于做成了某事，通常不用could，而用was/were able to来表示。

这时，was/were able to相当于managed to do或succeed in doing。

如：After the accident it was a long time before she was able to walk again.The fire was very big, but most people were able to escape from the building.(3) 惯用形式“cannot …too…”表示“无论怎么……也不（过分）”。

如：You cannot be too careful.你越小心越好。

惯用形式“cannot but+ 不定式（不带to）”表示“不得不，只好”。

如：I cannot but admire her determination.我不得不钦佩你的决心。

情态动词常见的情态动词有：can 能may 可以will，would （表意愿）need 需要dare 敢must 必须have to 不得不shall，should 应该（表义务）ought to 应该1.can，could 的用法1.1表能力，有“能”、“会”、“能够”的意思例如：Can you drive a car? 你会开车吗？-----Yes, I can. 我会。

-----No, I can't. 我不会。

1.2表允许，在口语中代替may，有“可以”的意思例如：Can I use your bike?我可以用你的自行车吗？1.3表示可能性，常用于否定句和疑问句例如：Can it be true?那会是真的吗？Today is Sunday. He can't be at school.今天是星期天。

他不可能在学校里。

1.4过去式could表示的语气更加委婉、客气例如：Could I come to see you tomorrow?明天我可以来见你吗？1.5 can 和be able to 的比较1) can 只有一般现在时和一般过去时两种时态(could)，其他时态要用be able to的形式例如：I haven't been able to get in touch with her.我一直没能和她联系上。

2) 通常can 和be able to 可以互换例如：He will come if he can.如果可能的话，他一定会来。

2.may，might的用法2.1表示许可或征求对方的许可，有“可以”的意思。

例如：You may go now.你可以走了。

May I use your computer?我用一下你的电脑可以吗？2.2回答以may开头的疑问句有如下表达法：例如：May I smoke here? 我可以在这儿抽烟吗？-----Yes, you may.-----Yes, please.------No, you can't.------No, you mustn't.------No, you'd better not.2.3表示猜测，通常只用于陈述句例如：You may be right.你可能是对的。

情态动词讲解及练习(含答案)一、单项选择情态动词1．—You rang me up at about 10:00 last night, didn't you?—No, I didn't phone you. It someone else.A．must have been B．could be C．must be D．could have been 【答案】A【解析】【详解】考查情态动词+have done。

句意：“昨晚10点左右你给我打了电话，是吗？”“不，我没给你打电话。

一定是别人干的。

” must have done 是对过去发生的动作最有把握的猜测，意思是“一定”，结合语境可知，我没有打电话给你，因此猜测一定有别人给你打了电话。

故选A 项。

2．Using AI， many companies are now conducting experiments that__________ possible just a few years ago．A．would have been B．might have beenC．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．-- Did Jim come?-- I don’t know. He _______ while I was out.A．might have come B．might comeC．must have come D．should have come【答案】A【解析】【详解】考查情态动词推测用法。

句意：Jim来了吗？--我不知道，在我不在的时候，可能来过。

情态动词的用法及专项练习第1 & 2类:第3类:1.could have p.p.①指过去某事有可能发生, 但并未．真的．．发生。

They could have won the race, but they didn't try hard enough.He could have studied harder, but he was too lazy and that's why he failed the exam.②指过去有能力做某事, 但并未真的．．．做过。

I could have stayed up late, but I decided to go to bed early.Julie could have bought the book, but she borrowed it from the library instead.③对过去的发生事情做出一种猜测，但实际上并不知道真假。

仅仅是做一种观点上的表达。

He could have got stuck in traffic.He could have forgotten that we were meeting today.He could have overslept.2. may / might have p.p.(用法与could have p.p.第③点相同)对过去的发生事情做出一种猜测，但实际上并不知道真假。

仅仅是做一种观点上的表达。

He might have got stuck in traffic.He might have forgotten that we were meeting today.He might have overslept.3. couldn't have p.p.渴望、期望做某事, 但由于外部原因不可能做成, 即便是很想做。

是一种虚拟语气。

I couldn't have arrived any earlier. There was a terrible traffic jam (= it was impossible for me to have arrivedany earlier).He couldn't have passed the exam, even if he had studied harder. It's a really, really difficult exam.4. should / ought to have p.p.有一个好主意，该做而没有做。

(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, could1) 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。

【精品】情态动词讲解及练习(含答案)一、单项选择情态动词1．Our English teacher is considerate，helpful，and warm-hearted，but sometimesshe________________ be angry at our silly mistakes.A．should B．mustC．can D．shall【答案】C【解析】【详解】考查情态动词。

句意：我们的英语老师很体贴、乐于助人、热心肠，但有时她可能为我们愚蠢的错误而发火。

can表示一种客观的可能性，但不一定会发生，故C项正确。

2．Most of the top leaders expressed a common desire at the UN conference, ______ that different cultures ______ coexist with tolerance.A．the one ; must B．the one ; should C．one ; must D．one ; should【答案】D【解析】【详解】考查替代和情态动词。

句意：大多数高层领导人在联合国大会上表达了一个共同的愿望，即不同的文化应该与宽容共存。

大多数高层领导人在联合国大会上表达了一个共同的愿望，即不同的文化应该与宽容共存。

替代表泛指的单数名词，通常用one替代。

此处用one替代前面的a desire，是同位语；结合句意第二空用情态动词should“应该”。

故选D。

【点睛】that ,it ,one 代指前面的名词时的用法1.one 指代前面出现的可数名词，是泛指。

可以和冠词连用，也可以有自己的定语。

一般不能用做特指，但和定冠词连用时可以是特指。

如： Please show me the cup, the red one on the shelf.2.It 指代前面提到的单数名词，相当于the one。

第七讲初中英语情态动词讲解情态动词的概念情态动词本身有具体的词义，但也同助动词一样，需要与其他词语一起构成句子的谓语。

情态动词有四个特征：①不能单独做谓语，必须与其他动词一起构成谓语；②没有人称和数的变化；③情态动词后必须跟动词原形；④具有助动词功能。

二、情态动词的用法1. can的用法：1）表示能力，译为“能、会”，即有某种能力，尤其是生来具备的能力，此时may和must不可代替它。

例句：She can swim fast, but I can 她能游得很快，但我不能。

例句：I can see with my eyes. 我用眼睛看。

2）表示许可，常在口语中。

这里可以用may代替。

例句：You can/may use my dictio nary. 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不是“不能”而是“不可能”。

例句：The news is true. 这消息是真的。

一般疑问句Is the news true? 这消息是真的吗？表推测、怀疑Can the news be true? 这个消息会是真的吗？例句：-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 isvisit ing the Great Wall. 不可能。

咱们老师正在游览长城呢。

【例题】一I think Miss Gao must be in the library. She said she would go there.—No. She _____________ be there, I have just bee n there.A. can 'tB. mustn 'tC. needn 'tD. wouldn 't注意：can和be able to 的区别表达“能够”的时候，两者可以互换。