情态动词--知识点归纳(共5页).doc
精选优质文档-倾情为你奉上情态动词例1. Tom has several houses in London, so he _ be very rich. A. may B. must C. can D. might例2. - Is jack on duty today? -It _ be him. Its his turn tomorrow. A. mustnt B. wont C. cant D. neednt1. Tom,you put all your clothes on the floor like this! Awouldnt B. mustnt C. neednt D. may not 2. John, look at the time ._you play the piano at such a late hour? A. Must B. Can C, May D. Need3. He _have completed his work; otherwise, he wouldnt be enjoying himself by the seaside. A. Should B .must C. wouldnt D. cant 4.I was on the high way when this car went past followed by a police car .They _at least 150kilometers an hour. A. should have been doing B. must have been doing C. could have done D. would have done 5.-The women biologist stayed in Africa studying wild animals for 13years before she returned . -Oh dear! She _a lot of difficulties! A may go through B .might go through C ought to have gone through D .must have gone through 6.-Tom is never late for work. Why is he absent today?-Something _to him. A. must happen B. should have happened C. could have happened D. must have happened 7.This cake is very sweet .You _ a lot of sugar in it. A. should put B. could have put C. might have put D. must have put8.Children under12 years of ages in that country _be under the supervision when in a public library. A. .must. B. may C. can D. need9.-Who is the girl standing over there ?-Well ,if you _know, her name is Mabel. A. may B. can C. must D. shall【知识点归纳】1) mustnt 表”禁止 一定不要”.2) must 有“必须,偏偏,偏要”的意思.3) must have done sth. 过去一定做了某事。表示对过去的肯定推测4) must have been doing sth过去一定在做某事,表示对过去事情的推测。5) must表示“猜测”意义时, 一般把握性很大, 意为“想必, 一定, 必定”。6) must表示“猜测”时只用于肯定句中, 如果是疑问句或否定句应该用can或cant.7) 没有mustnt have done 的形式。1.The World Wide Web is sometimes jokingly called the World Wide Wait because it _be very slow. A. should B. must C. will D. can2.-Shall I give you a ride as you live so far away?-Thank you. _. A. It couldnt be better B. Of course you can C. If you like D. It is up to you 3.-Do you know where David is? I couldnt have find him any where.-Well. He_ have gone far,for _his coat is still there. A. shouldnt B. mustnt C. cant D. wouldnt4.I_have been more than six years old when the accident happened. A. shouldnt B. couldnt C. mustnt D. neednt5.If I _plan to do anything I wanted to ,Id like to go to Tibet and travel through as much of it as possible.A. would B could C. had to D .ought to6.-If the traffic hadnt been so heavy ,I could have been back by 6oclock.-What a pity! Tina _here to see you . A. is B was C. would be D .has been.7.He paid for a seat ,when _have entered free. A. could B. would C. must D need.8.-Mum I ve been learning English since 8 oclock ._I go out and play for a while-No ,Im afraid not. Besides ,it is raining outside now.A. Cant B. Wouldnt C. May not D. Wont9.My English-Chinese dictionary has disappeared .Who _have taken it?A. should B. must C. could D. would【知识点归纳】1) can 表“能力” Man can not live without air.表“可能” He can (not) be hungry. Cold can be dangerous. Can / Could the news be true? 表“许可” Can / Could I borrow your car?2) cant / couldnt have done 不可能已经3) could 可以用于虚拟语气。4) could have done 可以表示“推测”,也可以表示“该做没做”。5) Can / Cant I 可以用来征询对方的建议.。1.There _be any difficulty about passing the road test since you have practised a lot in the driving school. A. mustnt B. shant C. shouldnt D. neednt2.-Ill tell Mary about her new job tomorrow.-You_ her last week. A. ought to tell B. would have told C .must tell D. should have told.3.I often see lights in that empty house .Do you think I_ report it to the police? A. should B. may C will D. can4You cant imagine that a well-behaved gentleman be so rude to a lady. Amight B. need C should D. would【知识点归纳】1)should 可用于比较有把握的的推测,已意思是”按理说,应该”2)should have done sth表示”过去本应该做某事却没有”做3)shouldnt have done sth.表示过去本不该做事却做例:You should have studied hard last term, but you didnt4)should 由“竟然”的意思 Its odd that she should marry such a mean man.1)-Lucy doesnt mind lending you her dictionary.-She _.Ive already borrowed one. A. cant B mustnt C neednt D shouldnt2)-Catherine ,I have cleaned the room for you .-Thanks. You _it .I could manage it myself.A. neednt do B. neednt have done C. mustnt do D. shouldnt have done3)-I dont mind telling you what I know.-You _.Im not asking for it.A. musnt B. may not C. cant D. neednt【知识点归纳】1)neednt 表示没有必要.2)neednt have done sth,表示过去没有必要3)didnt need to do sth.表示过去没有必要做某实也没有做1)Helen_ go on the trip with us ,but she isnt quite sure yet.A. shall B. must C. may D. can. 2)I _pay Tracy a viait ,but Im not sure whether will have time this Monday.A .should B. might C. would D. could3)Sorry , I m late . I _have turned off the alarm clock and gone back to sleep again.A. might B. should C. can D. will【知识点归纳】1.may 表示可能性,意思是“也许”的意思2.may / might have done 以及 may not / might not have done 用法与can / could have done 以及 can not / could not have done 用法类似。3. may 可以表“许可、推测”, might 可以表“许可、推测”,谈论过去时,might是may 的过去式I asked her if I might call her and see her.(本句中might 是 may 的过去式)但征求对方意见时,might 不表示过去,而是委婉语气1)”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 2)-Excuse me ,but I want your computer to type a report.-You _have my computer if dont take care of it. A. shant B. might not C. neednt D. shouldnt【知识点归纳】1.shall表示意愿,一般用于二,三人称2.表示法律条文规定的内容 见书上 109页1)When he was there ,he go to the coffee shop at the corner after work everyday.A. would B. should C. had better D. might 【知识点归纳】would 意思是过去常常,表示过去的习惯。但不可以用于表状态的词。如:不可以说:He would be a teacher.1)The fire speed through the hotel very quickly but everyoneget out.A. had to B. would C. was able to D. could【知识点归纳】was able to 意思是做成了某事 Could I borrow your dictionary? Yes, of course you_ . A. might B. will C. can D. should【知识点归纳】 may表示允许,否定形式为mustnt(不允许);cancould, maymight都可用来表示“请求允许或许可”,过去式could和might常用于疑问句,表示礼貌,答语中常用原形can或者may,不可再用过去式could或might。 What do you think we can do for our aged parents? You _ do anything except to be with them and be yourself. A. dont have to B. oughtnt to C. mustnt D. cant【知识点归纳】must与have to都可以表示“必须”的意思,但must表示主观看法,have to侧重于客观需要。【补充】:注意事项1.can表“怀疑”,译为“难道” Cant I go now?2.can 只有现在时和过去时,而be able to 时态较多,且shall/ must/ will/ have等助动词或情态动词后只能用be able to3.can 和be able to 不能连用4.can 只能表示一般能力,不表示特定场合下的能力;而be able to 表示通过努力和意志能够做到或者已经做到的,感情色彩较浓,强调有没有能力胜任1. 表委婉的提问 Could I have a look at your new dress? 注意:回答语中表示允许某人做某事要用 Yes, you can .(不能用could) No, you cant.(不能用couldnt)Might I have a look at your new dress? 注意:回答语中表示允许某人做某事要用 Yes, you may .(不能用might) No, you may not.(不能用might not)5. may (might) as well “最好,不妨” You may/ might as well have a try. may (might) well “很可能,极有可能” You may/ might well be right.6. will would will作情态动词时有以下用法: (1)当情态动词will表示意愿或决心时,也可用于条件状语从句。 If you will listen to me, Ill give you some advice on how to learn English. (2) 表示请求。 Will you give me a hand ? would的用法 (1)表示礼貌的请求。 Would you close the window, please? (2)表示过去的倾向性动作或习惯。 John promised his doctor he _ not smoke, and he has smoked ever since. A. might B. should C. could D. would need dareneed既可用作情态动词,也可用作实义动词。 作情态动词neednt = dont have to 不必 What sort of house do you want to have? Something big? Well, it _ be big thats not important. A. mustnt B. neednt C. cant D. wont need还可作实义动词(a) The elderly man needs / wants /requires looking after every day . = The elderly man needs / wants / requires to be looked after every day .(b) Does he need to take the medicine four times a day ?dare的用法(1) dare作为情态动词,主要用于疑问句,否定句和条件从句中,一般不用于肯定句. a. How dare you say Im unfair ? b. He darent speak English before such a crowd, dare she ? c. If he dare break the rule, he will be punished.(2) dare作实义动词,有时态、人称和数的变化。所不同的是,在肯定句中,dare 后面通常接带to的不定式;在否定和疑问句中, dare后可接带to或不带to的不定式。(当 情态动词,后接 do; 当 实义动词,后接 to do, 疑问、否定句 to 可以省略。) (a) I dare to swim across the river. (b) He doesnt dare (to) answer.情态动词时态专心-专注-专业