九情态动词

情态动词⏹英语助动词（auxiliaries）主要有两类，基本助动词(primary auxiliaries)和情态动词(modal auxiliaries)。

⏹基本助动词有三个，即do, have 和be。

⏹情态动词有九个，它们是:can, may, must, ought to, shall, will, need, dare, used to等等。

加上过去式共十三个，could,might,should,wouldCan 能，可能固定搭配：cannot (help) but do=can`t help doing 不得不，只能can’t/couldn't+不定式完成体”结构1. “can’t/can have done”结构表示以“现在”为出发点，推侧过去某种“动作”发生了，多用于否定句和疑问句中，意为“很可能……了’，“不太可能……”等。

如:Her interference can have done a great deal of harm. 她的干涉可能已造成巨大伤害.She can’t have written this because it is in French and she doesn't know French. 这不可能是她写的，因为这是用法文写的，而她不懂法文2.在疑问句或否定句中，”can +不定式完成体”结构表示语气很强的猜侧或推断。

如:Can he have made a mistake? 他会弄错了吗?(含义是:他不可能搞错的)比较：Could he have made a mistake?他会弄错了吗? (一般性推测)He can' t have made a mistake.他肯定不会弄错。

Can和could同样用于比较的时候，can的语气更强烈3. “could/couldn`t+不定式完成体”表示以“过去”为起点Could have done 虚拟语气用法：本来可以，本来会，本来能（事实上没有）推测：有可能Couldn`t have done 虚拟语气用法：本不会，本不能（实际上已经做了）推测：不会，不可能Tom could have broken the glass. He was the only one at home yesterday. 汤姆可能打破了这个玻璃杯Mary couldn`t have bolded the door.玛丽不可能把门闩上。

情态动词would和used to的用法区别1. would 和used to都表示过去的习惯行为，意思为：过去常常。

would 表示过去某时间的意志、愿望和决心。

如：He would come to have a chat with us when he was free.他有空时，常会过来跟我们聊天He used to live in a cottage near the river. 他过去常住在河边的一座小木房里。

2. would 往往强调过去的一种可能性,而不暗示现在的情况；而used to强调过去常这样干，而现在不干了, 强调今惜对比。

如：He would sit there alone, thinking. 他会独自一人坐在那儿思考。

He used to swim in the river in summer. 夏天他常常在这条河里游泳。

3. would 作will的过去式，表示过去的一种意愿或将要做的事情，意思为：将会。

而used to无此意义。

如：People would go to ask him for advice when they came into trouble. 人们碰到麻烦事，就会去问他解决的办法。

4. would有时也可用来指现在，表示一种委婉、客气的请求，对于用它来提问题的回答，须用will，不能用would。

而used to无此意义及用法。

如：Would you please help me with this case? 请帮助我提一下这个箱子好吗？Yes, I’d like to. / I will. 好，我非常乐意。

5. would一般接表示动作的动词，不能与表示状态或情感、意识方面的词连用，而used to无此限制。

如：He would get here at eight. 他在八点会到这儿来。

He used to be / get here at eight. 他过去常在八点来这儿。

九年级英语情态动词教案一、选择题1．—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．should2．To my joy, we_________ go to the bank. Mary has lent us some money.A．shouldn’t B．needn’t C．couldn’t D．wouldn’t3．—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 mend4．Sorry, smoking is not allowed here. If you ________ , you will be fined according to the rules. A．can B．will C．may D．must5．—Is it really necessary for me to go shopping with a mask on?—I’m afraid you ________ in public. It is not only to protect yourself but also to protect others. A．must B．should C．can D．need6．Hurry up, or we ________ miss the beginning of the film.A．should B．must C．may D．have to 7．—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．should8．— Excuse me, could you tell me where the Nanjing Brocade Museum is?—Go along this road for five minutes. You ________ miss it. It’s a huge building. A．mustn’t B．can’t C．needn’t D．shouldn’t9．—________ I see your ID card? We have to check your personal information.—Sure. Here you are.A．May B．Need C．Should D．Must10．—Be careful! Fire ________ be dangerous sometimes.—OK. I will put it out right away.A．mustn’t B．should C．can D．needn’t 11．—Who’s the man over there? Is that Mr. Black?—It ________ be him. Mr. Black is much taller than that man.A．may B．must C．can’t D．mustn’t 12．—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．need13．— 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．may14．You ________ write the report again because spelling mistakes are not allowed at all. A．must B．can C．may D．could15．You'd better __________ hard from now on, __________ you will fail the exam. A．work; and B．working; or C．working; and D．work; or 16．— 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’t17．A lot of online resources ________ be used either by teachers at school or parents at home. A．can B．should C．need D．must 18．—Amy, I hear you've got many foreign coins．_______ I have a look?—Of course, I'll fetch them for you．A．May B．MustC．Should D．Need19．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 20．—Mum, why do I have to wear a mask before entering the supermarket?—For your health and safety, you ________ be too careful.A．shouldn’t B．can’t C．must n’t D．needn’t 21．Look at the floor, Tom! ________ you watch TV while having a meal?A．Should B．Could C．Must D．May 22．According to the rule, used batteries ________ be dropped in the red bin for harmful wastes. A．may B．would C．should D．might23．You _________ smoke here! Look at the sign. It says "No smoking".A．needn't B．mustn't C．can D．may24．— Listen! Tom ________ be listening to the music while doing his homework.—Let’s go upstairs to remind him to turn it off.A．should B．could C．would D．must 25．—Suzy described every detail of the accident just now.—Her memory ________ be completely back.A．shall B．need C．must D．could26．—Is that Mr Zhou?—It ________ be him. He has gone to Beijing.A．can B．may C．can’t D．shouldn’t 27．Most young people like shopping online because they ________ spend much time going from shop to shop.A．needn’t B．can’t C．mustn’t D．shouldn’t 28．— 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’t 29．You ________ drive after drinking alcohol(酒). It’s against the law.A．mustn’t B．needn’t C．couldn’t D．wouldn’t30．—Is it usually warm in Yancheng in May?—Yes. But it _______ be rather cold sometimes.A．must B．should C．would D．can31．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．—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’t 33．Sometimes smiles ________ be false, hiding other feelings like anger, fear or worry. A．should B．would C．must D．can34．You’ve got an A in the maths test again. You ________ be good at it.A．can B．may C．must D．should 35．—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．mustn’t C．needn’t D．shouldn’t 36．For the safety of the passengers, objects like guns ________ be carried on board.A．may not B．needn’t C．might not D．mustn’t 37．—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’t 38．—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．need39．—In China, many students have to stay up late to do their homework.—No worries. The government has realized the problem. I’m sure there ________ be good news soon.A．can B．should C．must D．need40．—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 s ure there ________ be good news soon.A．can B．should C．need D．must【参考答案】一、选择题1．D解析：D【详解】句意：——我的车今天能修好吗？——应该能，先生，如果有什么问题我会打电话给你。

初中英语：情态动词介绍：情态动词是英语中的一个重要语法点，它们可以用来表示可能性、必要性、责任、建议等等。

在英语口语中，情态动词的使用非常频繁，但是不同的情态动词的用法又各有不同，因此，我们有必要系统地学习情态动词的用法。

本文将为大家详细介绍情态动词的用法，并提供大量的练习题和答案，帮助大家掌握情态动词的用法，让你的英语口语更加流利。

一、情态动词的概念情态动词是指表示说话人对所说内容态度、说话人主观意愿、能力、建议、命令、禁止等的动词。

常用的情态动词有can、could、may、might、must、shall、should、will、would 等九个词。

二、情态动词的用法1.表示能力、许可、建议、命令、禁止等情况1) Can / CouldCan 表示现在或未来有能力做某事；Could 表示过去或未来有能力做某事，或表示委婉语气。

如：I can swim.（我会游泳。

）Could you open the window?（你能帮忙把窗户打开吗？）2) May / MightMay 表示有可能；Might 表示有可能性的弱化。

如：It may rain tomorrow.（明天可能会下雨。

）I might go to the party.（我可能去参加聚会。

）3) MustMust 表示必须，有义务或责任做某事。

如：You must wear a seat belt in the car.（在车上必须系安全带。

）I must finish my homework tonight.（我今晚必须完成作业。

）4) Shall / ShouldShall 表示说话人的意愿，用于提出建议或征求意见；Should 表示应该做某事，并且有义务去做。

如：Shall we go to the cinema tonight?（今晚我们去看电影好吗？）You should stop smoking.（你应该戒烟。

）5) Will / WouldWill 表示意愿、意图和承诺；Would 表示委婉请求和含蓄的建议。

专题九情态动词can和would一、情态动词：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。

情态动词后面加动词原形。

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，否定式构成是在情态动词后面加"not"。

二、can，表示能会，后面接动词原形，如：I can sing. 我会唱歌。

She can dance. 她能跳舞。

（1）有关can的句型：a.肯定句：主语+can+动词原型1.Lingling can ride a horse. 玲玲会骑马。

2.He can speak Chinese.他会说中文。

3.My father can play table tennis.我的爸爸会打乒乓球。

b.否定句：主语+can+not+动词原形1. Lingling can’t ride a horse.2.3.c.一般疑问句及回答：Can+主语+动词原形1.Can Lingling ride a horse? Yes,she can.2.3.d.特殊疑问句：特殊疑问词+can+主语+动词原形1. What can you do? 你会做什么？2. How many birds can you see? 你能看见多少只鸟？3. Who can help me? 谁能帮助我？你还能造出有关can的特殊疑问句吗？练习：1、Can you play ____piano? A、a B、an C、the2、Can you dance? yes, I ____. A、do B、can C、can’t3、Can he Write English? No,he ____ A、can B、can’t C、does4、I __ ride a bike ,but I ____drive a car. A、can , can B、can’t , can’t C、can, can’t5、She can _____basketball . A、play B、playing C、plays三、would是一个情态动词，意思是“愿意”，其后接动词原形；eg: I would stay at home.我愿意呆在家里。

九年级英语情态动词must和haveto辨析单选题40题1. We ____ clean the classroom after school.A. mustB. have toC. mustn'tD. don't have to答案：B。

本题中，“放学后打扫教室”是学校的规定，是一种外部的客观要求，所以用“have to”，表示“不得不”。

“must”通常表示主观上的“必须”。

2. My mother is ill. I ____ stay at home and look after her.A. mustB. have toC. mustn'tD. don't have to答案：B。

妈妈生病需要照顾，这是一种客观情况导致的不得不做的事，用“have to”。

“must”更多强调主观意愿。

3. You ____ be late for school.A. mustB. have toC. mustn'tD. don't have to答案：C。

上学不能迟到，这是规定，用“mustn't”表示“禁止”，“must”是“必须”，“have to”是“不得不”，“don't have to”是“不必”，都不符合题意。

4. We ____ obey the traffic rules.A. mustB. have toC. mustn'tD. don't have to答案：A。

遵守交通规则是我们应该主动去做的，是主观上的“必须”，用“must”。

5. The teacher said we ____ finish our homework on time.A. mustB. have toC. mustn'tD. don't have to答案：A。

老师要求按时完成作业，这是一种主观上的要求，用“must”。