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1、2022年高考英語 考點(diǎn)一遍過 考點(diǎn)19 情態(tài)動(dòng)詞（含解析） 高考頻度：★★★★★ 【命題解讀】 高考研究英語中常用的情態(tài)動(dòng)詞主要有can，could，may，might，must，will，would，shall，should，ought to，dare，need，used to，had better等。在學(xué)習(xí)情態(tài)動(dòng)詞時(shí)應(yīng)注意以下幾點(diǎn)：同一情態(tài)動(dòng)詞表示不同的意義的情況；情態(tài)動(dòng)詞后跟各種形式的用法；尤其要注意＂情態(tài)動(dòng)詞+完成式＂是高考中的重點(diǎn)所在。 【命題預(yù)測(cè)】 情態(tài)動(dòng)詞是各地高考試題中的必考項(xiàng)目，每年高考單獨(dú)命題區(qū)的單項(xiàng)填空必有一道考查情態(tài)動(dòng)詞的項(xiàng)目。新課標(biāo)卷主要在語法填空和短

2、文改錯(cuò)中考查?？键c(diǎn)依次是：推測(cè)(可能性)→請(qǐng)求/允許→必要性→特殊用法。試題的立意不偏不怪，但有效信息越來越隱蔽，語境越來越真實(shí)，考查角度越來越細(xì)致，這些因素在很大程度上增加了試題的難度。 【復(fù)習(xí)建議】 1. 真實(shí)的語境中對(duì)情態(tài)動(dòng)詞的理解和把握； 2. 掌握情態(tài)動(dòng)詞表示推測(cè)和可能性的用法； 3. 掌握情態(tài)動(dòng)詞表達(dá)＂情感、態(tài)度、語氣等＂方面的用法。 考向一　can，could與be able to的用法 1．表示能力，意為＂能，會(huì)＂。 ?Many people can use the puter. 許多人會(huì)用電腦。 ?If you have a good sleep，you

3、 will be able to work out this problem. 如果你好好睡一覺，你將能夠解出這道題。 ?I could have worked out the problem，but I was too nervous. 我本來可以解決這個(gè)問題，但我太緊張了。 2．can/could表示驚訝，常用在否定句和疑問句中。 ?How can you treat me like that? 你怎么能那樣對(duì)我？ 3．can/could表示禮貌地請(qǐng)求別人做某事，意為＂能，可以＂。 ?Can I have a word with you? It won’t take lon

4、g.(表示請(qǐng)求)我可以和你談?wù)剢?？不?huì)花很多時(shí)間的。 【易混辨析】 can和be able to 用法上的區(qū)別 1. can只有兩種時(shí)態(tài)，即can 和could；而be able to 有多種時(shí)態(tài)，如was/were able to，will/shall be able to，have/has been able to等。 I’ll be able to drive the car in a week. Through his diligent work, the deaf-mute has been able to read and write in a sign langu

5、age. 2. 表示過去通過努力終于做成了某事要用be able to，而不能用can。 I was able to swim to the bank after the boat turned over. can 和be able to 都可以表示能力。can泛指一般的能力；be able to則主要指具體做到了某件事的能力，其形式主要是靠be 發(fā)生變化，所以形式比can 多。 3. can能表猜測(cè)，be able to不能。can的這種用法主要用于疑問句和否定句。其肯定形式是must be。 Somebody is knocking at the door. W

6、ho can it be? It can’t be our teacher who is knocking at the door. 4. can 可以表 ＂允許＂，與may可以互換，此時(shí)不能用be able to 代替。 —Can / May I sit here? —Yes, please. 1. (2018·北京卷·單項(xiàng)填空) In today’s information age, the loss of data _________ cause serious problems for a pany. A. need B. should C

7、. can D. must 【參考答案】C 2. (2017·北京卷·單項(xiàng)填空)Samuel, the tallest boy in our class, ________ easily reach the books on the top shelf. A. must B. should C. can D. need 【參考答案】C　 考向二　may與might的用法 1．表示請(qǐng)求、允許時(shí)，might比may的語氣更委婉一些，否定回答時(shí)要用mustn’t，表示＂不可以＂＂禁止＂＂阻止＂之意。 ?—May I

8、play basketball this afternoon? —No，you mustn’t. ——今天下午我可以打籃球嗎？ ——不，不行。 2．＂may/might as well＋動(dòng)詞原形＂意為＂最好，倒不如＂，may/ might well＋動(dòng)詞原形，意為＂很可能＂。 ?He may/ might well stay in Beijing now. 他現(xiàn)在很可能呆在北京。 ?If you think the price of beef is too high，you might as well buy some pork.It depends on you. 如果你認(rèn)為

9、牛肉太貴的話，你不妨買些豬肉。你自己決定。 might為may的過去式，但也可以代替may，語氣較為婉轉(zhuǎn)客氣或更加不肯定。 He might not e today. 今天他也許不來了。(語氣不肯定) You might also get a headache when you work too hard. 當(dāng)你工作太努力時(shí)，你也可能患頭痛。 You feel all the training a waste of time, but I’m a hundred percent sure later you’ll be grateful you did

10、 it. A. should B. need C. shall D. may 【參考答案】D 考向三　must與need的用法 1．must用于否定句，表示＂禁止＂，表示說話者的命令或指令，語氣比較強(qiáng)烈。 ?You mustn’t play with the knife，or you may hurt yourself.你千萬不要玩刀，否則會(huì)傷到自己。 2．must表示必要性，意為＂必須＂。 ?Progress must lead to a better life and a better way of doing things. 發(fā)

11、展一定會(huì)促成一種更好的生活，更好的做事情的方法。 3．must表示偏執(zhí)、固執(zhí)，意為＂非得，偏要＂。 ?If you must go，at least wait until the storm is over. 如果你非要走的話，至少等到暴風(fēng)雨結(jié)束。 ①must開頭的疑問句，其否定回答通常用don’t have to或needn’t。而不用mustn’t。 —Must I finish my homework first? 我必須先完成作業(yè)嗎？ —No, you don’t have to/ needn’t. 不，你不必。 ②can和must在表推測(cè)時(shí)，can一般用于否定句中

12、，而must 常用于肯定句中。 It can not be Li Lei. 那個(gè)人不可能是李磊。 It must be Li Lei. 那個(gè)人肯定是李磊。 【易混辨析】 must和have to 1. 表示必須、必要。 在回答引出的問句時(shí)，如果是否定的，不能用mustn’t（禁止，不準(zhǔn)），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是說

13、話人的主觀看法，而have to則強(qiáng)調(diào)客觀需要。must只有一般現(xiàn)在時(shí)，have to有更多的時(shí)態(tài)形式。 The play isn’t interesting, I really must go now. I had to work when I was your age. 3. 表示推測(cè)、可能性，只用于肯定的陳述句。 You’re Tom’s good friend, so you must know what he likes best. Your mother must be waiting for you now. 4. need 的用法： （1）情態(tài)動(dòng)詞，

14、＂需要，有必要 ＂，一般用于否定句或疑問句中。 You needn’t e here this afternoon. 你今天下午不必來。 （2）行為動(dòng)詞，＂需要, 有必要＂，可以用于各種句式中。 You don’t need to go now. 你不必現(xiàn)在就走。 I need to have a rest. 我需要休息一下。 Do we need to finish all the work today? 我們今天需要完成所有的工作嗎？ 【巧學(xué)妙記】 need的用法助記口訣 實(shí)義動(dòng)詞表＂需要＂，后接名、代、不定式。 need后接動(dòng)名詞，主動(dòng)形式表被動(dòng)。 情態(tài)動(dòng)詞表＂需要＂

15、，沒有人稱、數(shù)之變。 其后直接加動(dòng)原，多用疑問與否定。 【易混辨析】 dare和need 1. dare作情態(tài)動(dòng)詞用時(shí)，常用于疑問句、否定句和條件從句中，過去式形式為dared。 How dare you say I’m unfair? He daren’t speak English before such a crowd, dare he? If we dared not go there that day, we couldn’t get the beautiful flowers. 2. need 作情態(tài)動(dòng)詞用時(shí)，常用于疑問句、否定句。在肯定句中一

16、般用must, have to, ought to, should代替。 You needn’t e so early. —Need I finish the work today? —Yes, you must. / No, you needn’t. 3. dare和 need作實(shí)義動(dòng)詞用時(shí)，有人稱、時(shí)態(tài)和數(shù)的變化。在肯定句中，dare后面常接帶to的不定式。在疑問句和否定句中，dare后面可接帶to或不帶to的不定式。而need后面只能接帶to的不定式。 I dare to swim across this river. He doesn’t dare (to)

17、 answer. He needs to finish his homework today. 1.—Can’t you stay a little longer? —It’s getting late. I really _________go now, My daughter is home alone. A .may B .can C . must D .dare 【參考答案】C 2.You __________be careful with the camera. It costs! A .must B. may

18、 C. can D. will 【參考答案】A 【答案解析】考查情態(tài)動(dòng)詞。根據(jù)下文的it costs可知，照相機(jī)很昂貴，可推斷此處是說，你一定要非常小心對(duì)待照相機(jī)。故選A 。may可能；can能夠，有時(shí)會(huì)；will會(huì)，愿意。 考向四　will與would的用法 1．表示請(qǐng)求、建議等，would比will委婉客氣。 ?Would you mind opening the window for me? 請(qǐng)你給我打開窗戶好嗎？ 2．will和would表示意志、愿望和決心。 ?I will never talk to him again. 我再也不愿意和

19、他說話了。 3．will可以表示一種習(xí)慣性的動(dòng)作，有＂總是＂或＂總要＂之意。 Fish will die without water.沒有水，魚會(huì)死去。 1. (2018·新課標(biāo)II卷·短文改錯(cuò)) As kid, I loved to watch cartoons, but no matter how many times I asked to them, my parents would not to let me. 考向五　shall，should與ought to的用法 1．shall用于第一、第三人稱疑問句中，表示說話人征求對(duì)方的意見和向?qū)Ψ秸?qǐng)示。 ?Shall

20、 we begin our new lesson today? 我們今天開始上新課好嗎？ 2．shall用于第二、第三人稱陳述句中，表示說話人給對(duì)方的命令、警告、允諾或威脅。 ?You shall be punished for what you have done. 你必須為你的所作所為受到懲罰。 3．should表示義務(wù)、職責(zé)等，意為＂應(yīng)該＂。 ?You should be strict with yourself as an officer. 作為一名官員，你應(yīng)該嚴(yán)格要求自己。 4．ought to表示應(yīng)該。 ?You ought not to be late for

21、such an important meeting. 這么重要的會(huì)議你不應(yīng)該遲到的。 5．shall還可表示法律、規(guī)定和條例中規(guī)定的＂應(yīng)該＂。 Whoever drives through a red light shall be fined at least 200 yuan.不論誰駕車闖紅燈，罰款至少200元。 【易混辨析】 should, ought to 1. should, ought to表示＂應(yīng)該＂，ought to表示義務(wù)或責(zé)任，比should語氣重。 I should help her because she is in trouble. You ou

22、ght to take care of the baby. 2. 表示勸告、建議和命令。should、ought to可通用，但在疑問句中常用should。 You should / ought to go to class right away. Should I open the window? 3. 表示推測(cè)，should、ought to (客觀推測(cè))，must(主觀推測(cè))。 He must be home by now. (斷定他已到家) He ought to/should be home by now.(不太肯定) This is where th

23、e oil must be.(直爽) This is where the oil ought to/should be.(含蓄) 考向六　情態(tài)動(dòng)詞表推測(cè)的用法 1．can用于肯定句中表示客觀的可能性，意為＂有時(shí)會(huì)＂；用于疑問句中可以表示推測(cè)，意為＂可能＂，有時(shí)表示一種驚訝的語氣；用于否定句中也可以表示推測(cè)，can’t意為＂不可能＂，語氣很強(qiáng)烈。 ?As we all know，an experienced teacher can make mistakes. 眾所周知，一位有經(jīng)驗(yàn)的老師也會(huì)犯錯(cuò)。 ?He can’t have left. His coat is here.

24、 他不可能已經(jīng)走了。他的外套還在這里。 ?Mr Bush is on time for everything. How can it be that he was late for the meeting？布什先生做什么事情都很準(zhǔn)時(shí)，他怎么可能開會(huì)遲到呢？ 2．may/might用于肯定句中可以用來表示不十分肯定的推測(cè)，意為＂有可能＂；用于否定句中也可以表示推測(cè)，may not意為＂可能不＂，表示一種不太確定的語氣。 ?—What are you doing this Saturday? —I’m not sure，but I might go to the Rolling Stone

25、s concert. ——本周六你打算干什么？ ——還說不定，但我可能會(huì)去滾石音樂會(huì)。 3．must表示推測(cè)時(shí)只能用于肯定句中，意為＂一定，必定＂，表示十分肯定的語氣(在疑問句中或否定句中要用can/could)。 ?Someone must have used my umbrella yesterday. I found it wet. 昨天一定有人用了我的雨傘，我發(fā)現(xiàn)它濕了。 4．should用來表示推測(cè)時(shí)意為＂應(yīng)該＂，即含有＂按道理來說應(yīng)當(dāng)如此＂的意思。 ?There shouldn’t be any difficulty about passing the road te

26、st since you have practiced a lot in the driving school. 因?yàn)槟阍隈{校訓(xùn)練了那么多，通過路考應(yīng)該沒什么困難。 考向七?。⑶閼B(tài)動(dòng)詞＋have done＂的用法 情態(tài)動(dòng)詞＋have done 用法 must have done 一定做過某事，其否定形式為can’t/couldn’t have done can/could have done (1)本來能夠做但卻未做 (2)可能做過某事 can’t/couldn’t have done 不可能做過某事 may/might have done 或許/可能做過某事 s

27、hould/ought to have done 本該做但卻未做，其否定形式表示本不該做但卻做了 needn’t have done 做了本沒有必要做的事情 1.＂must have done＂ ?表示對(duì)過去事情的肯定推測(cè)，譯成＂一定做過某事＂，該結(jié)構(gòu)只用于肯定句。 ?It must have rained last night, for the ground is wet. 昨晚一定下雨了，因?yàn)榈孛孢€是濕的。 ?You must have been mad to speak to the servant. 你和仆人說話，一定是發(fā)瘋了。 2.＂can’t have done＂

28、 表示對(duì)過去事情的否定推測(cè)，譯成＂不可能做過某事＂。 ?Mr Smith can’t have gone to Beijing, for I saw him in the library just now. 史密斯先生不可能去北京了，我剛才還在圖書館見過他。 ?Mary can’t have stolen your money. She has gone home. 瑪麗不可能偷你的錢，她回家去了。 3.＂can have done＂ ?表示對(duì)過去行為的懷疑，用于疑問句，譯成＂可能做過……嗎？＂。 ?There is no light in the room. Can they h

29、ave gone out? 屋里沒有燈，他們可能出去了嗎？ ?There is nowhere to find them. Where can they have gone? 到處找不到他們，他們可能到什么地方去呢？ 4.＂could have done＂ 是虛擬語氣，表示對(duì)過去事情的假設(shè)，意思是本來能夠做某事而沒有做。 ?He could have passed the exam, but he was too careless. 本來他能夠通過考試，但是他太粗心。 5.＂may have done＂ 表示對(duì)發(fā)生過的事情的推測(cè)，意思是＂可能已經(jīng)＂或＂也許已經(jīng)＂，用于肯定句中。

30、 ?—What has happened to George? 喬治發(fā)生了什么事？ —I don’t know. He may have got lost. 我不知道，他可能迷路了。 6.＂might have done＂ 表示對(duì)過去事情的推測(cè)，might與may意思相同，但可能性更小。多用于虛擬語氣結(jié)構(gòu)中。 ?She might have achieved greater progress, if you had given her more chances. 如果你多給她點(diǎn)機(jī)會(huì)，她可能已經(jīng)取得了更大的成績(jī)。 7.＂would have done＂ 虛擬語氣，表示對(duì)過去事情的假

31、設(shè)，意思是＂本來會(huì)……＂。 ?I would have told you all about the boy’s story, but you didn’t ask me. 我本來會(huì)告訴你這個(gè)小男孩的故事，但是你沒有問我。 8.＂should have done＂ 意思是＂本來應(yīng)該做某事，而實(shí)際沒做＂。＂shouldn’t+have+done＂表示本來不應(yīng)該做某事，而實(shí)際做了。含有指責(zé)對(duì)方或自責(zé)的含義。 ?Tom, you are too lazy. The work should have been finished yesterday. 湯姆，你太懶惰了，這項(xiàng)工作本來應(yīng)該昨天就做完

32、的。 ?Look, Tom is crying. I shouldn’t have been so harsh on him. 看，湯姆哭了，我本不應(yīng)該對(duì)他如此嚴(yán)厲的。 9.＂ought to have done＂ 表示過去應(yīng)該做而實(shí)際并沒有做，譯成＂理應(yīng)做……＂，往往表示遺憾。與＂should have done＂用法基本一樣。 ?I ought to have gone home last Sunday. 我理應(yīng)上星期日回家。 ?You ought not to have given him more help. 你不應(yīng)該幫助他那么多。 10.＂need have done＂

33、 表示本來需要做某事而實(shí)際沒有做。＂needn’t have done＂則表示＂本來不需要做某事而實(shí)際做了＂ ?I needn’t have bought so much wine — only five people came. 我本來沒有必要買這么多酒，只來了五個(gè)人。 ?He need have hurried to the station. In that case, he wouldn’t have missed the train. 他本來需要快點(diǎn)去車站的，那樣的話，他就不會(huì)誤了火車。 （2015·福建卷·單項(xiàng)填空）—Sorry, Mum! I failed t

34、he job interview again. —Oh, it’s too bad. You _____________ have made full preparations. A. must B. can C. would D. should 【參考答案】D 題組一 基礎(chǔ)過關(guān) I. 用適當(dāng)?shù)那閼B(tài)動(dòng)詞填空 1. Can you help me? I _________ never understand this. 2. ___________ you tell me what time it is, please? 3. Henry _

35、_______ walk when he was one year old. 4. We are going for a walk. _________ you like to join us? 5. Tom, you ___________ leave your clothes on the floor like this. 6. The road is wet. It __________ have rained last night. 7. He has waited outside for half an hour. ___________ he e in? 8. These

36、 flowers have died. You _____________ have watered them. 9. __________ she be ten years old next month? 10. I ___________ have hurt your feelings but it was not my intention. II. 單項(xiàng)填空 1. You _____________ give me a lift. I want to walk home for exercise. A.needn’t B.couldn’t C.can’t D

37、.mustn’t 2. Remember that in some countries, you _____________ take flowers of a certain colour, because they’re unlucky. A.could not B.needn’t C.may not D.mustn’t 3. —Being young generations in China, _____________ they take up all of the challenges and opportunities that this countr

38、y offers? —Absolutely. A. mustn’t B. mightn’t C. shouldn’t D. couldn’t 4. —_____________ you interrupt now? Can’t you see I’m on the phone? —Sorry, sir, but it’s an emergency. A. Can B. Should C. Must D. Would 5. It is said that people _____________ reduce the risk of catch

39、ing some serious diseases by exercising. A. must B. can C. would D. need 6. I was very surprised that that little child _____________ have said such rude words to his parents. A. might B. could C. would D. should 7. My phone _____________ have been stolen while I was taking

40、 a bus. I can’t find it anywhere. A. can B.must C.should D.would 8. You _____________ so much cash with you, you know — that shop accepted checks. A.couldn’t have taken B.wouldn’t have taken C.shouldn’t have taken D.needn’t have taken 9. Without your help, we ________

41、_____ our task on time. I cannot thank you enough. A.can’t finish B.couldn’t finish C.can’t have finished D.couldn’t have finished 10. —Bob didn’t pass this exam. —What a pity! He _____________. A. should study hard B. should have studied hard C. would have studied ha

42、rd D. could have studied hard 題組二能力提升 用適當(dāng)?shù)那閼B(tài)動(dòng)詞完成下面短文 Miss Fang couldn’t read for very long without getting a headache. Her mother told her that she __1__go to the Health Service and see a doctor.＂You should see a doctor as soon as possible，＂ she said.＂You __2__need glasses.＂ When Miss Fang

43、 had free time, she went to the Health Service. The appointment clerk said that the doctor __3__see her at 3：30. Miss Fang replied that she would not be able to be there at 3：30 because she had a class then.＂The doctor __4__take you at about ten to four，＂ the appointment clerk suggested. ＂__5__I p

44、ut you down for ten to four，or would you rather e tomorrow？＂ Miss Fang thought she __6__(not) waste any more time. The teacher shouldn’t be unhappy if she asked for permission to leave the class a little early, as he was always so kind to everyone. And she replied, ＂I think I __7__make it at ten to

45、 four.＂ Miss Fang went to the class. She asked her teacher, ＂__8__I leave at 3：45 today？I __9__have an eye examination.＂ As expected, the teacher said, ＂Yes, of course you __10__.＂ 題組三體驗(yàn)真題 1.(2017·天津) My room is a mess, but I ________clean it before I go out tonight. I can do it in the morning.

46、 A. daren't B. shouldn't C. needn't D. mustn't 2. (2016·天津) It was really annoying; I ________ get access to the data bank you had remended. A. wouldn’t B. couldn’t C. shouldn’t D. needn’t 3.(2016·浙江)George _________ too far . His coffee i

47、s still warm . A. must have gone B. might have gone C. can’t have gone D. needn’t have gone 4.（2015 ? 重慶）You _________ be Carol. You haven’t changed a bit after all these years. A. must B. can C. will D. shall 題組一 基礎(chǔ)過關(guān) I. 用適當(dāng)?shù)那閼B(tài)動(dòng)詞填空 1.

48、 can 2. Could/Can 3. could 4. Would 5. mustn’t 6. must 7. Shall 8. should 9. Will 10. may II. 單項(xiàng)填空 1. A 【解析】考查情態(tài)動(dòng)詞。句意：你不必讓我搭便車。為了鍛煉我想走回家。needn’t不必；couldn’t（過去）不能；can’t不能；mustn’t禁止。故選A。 2. D 【解析】考查情態(tài)動(dòng)詞。句意：記住在一些國(guó)家，你不能帶某些顏色的花，因?yàn)樗鼈兪遣恍疫\(yùn)的。這里表示＂禁止＂用mustn’t。could not不能（表示能力）； needn’

49、t不必；may not可能不。故選D。 3. C 【解析】考查情態(tài)動(dòng)詞。句意：作為中國(guó)的年輕一代，難道他們不應(yīng)該接受這個(gè)國(guó)家提供的所有挑戰(zhàn)和機(jī)會(huì)嗎？should表示＂應(yīng)該＂，故C項(xiàng)正確。 4. C 【解析】考查情態(tài)動(dòng)詞。句意：——你偏要現(xiàn)在打斷嗎？難道你沒有看見我在打電話嗎？——對(duì)不起，但是這是緊急事情。Can 能夠；Should應(yīng)該；Must必須，偏要；Would將會(huì)。故選C。 7. B 【解析】考查情態(tài)動(dòng)詞。句意：一定是我乘坐公共汽車的時(shí)候手機(jī)被偷了。我到處都找不到它。can能；must必須；should應(yīng)該；would將會(huì)。must have done過去一定做某事。故選

50、B。 8. D 【解析】考查情態(tài)動(dòng)詞+have done。句意：——你本不必帶這么多現(xiàn)金在身邊。你知道那家商店接受支票。couldn’t have taken過去不可能做了；wouldn’t have taken過去不會(huì)做而做了；shouldn’t have taken本不應(yīng)該做某事而做了；needn’t have taken過去本不必做某事而做了。故選D。 9. D 【解析】考查情態(tài)動(dòng)詞+完成式的用法。句意：沒有你的幫助，我不可能按時(shí)完成我們的任務(wù)。我再怎么感謝你都不過。對(duì)過去事情的否定推測(cè)用couldn’t have doneb表示過去不可能做某事。故選D。 10. B 【解析

51、】考查情態(tài)動(dòng)詞+have done。句意：——Bob沒有通過考試?！孢z憾！他本應(yīng)該努力學(xué)習(xí)的。should have done意為＂過去本應(yīng)該做卻沒有做＂，would have done意為＂過去本來會(huì)做卻沒有做＂；could have done意為＂過去本可能做卻沒有做＂。故選B。 題組二能力提升 適當(dāng)?shù)那閼B(tài)動(dòng)詞完成下面短文 1.should　 2.might　 3.could　 4.might　 5.Shall 6.shouldn’t　 7.can　 8.May/Can　 9.must　 10.can 題組三 體驗(yàn)真題 1.C　【解析】 考查情態(tài)動(dòng)詞。根據(jù)“I can do it in the morning.”可知現(xiàn)在沒必要打掃房間。故選C項(xiàng)。needn't不必；daren't不敢；shouldn't不應(yīng)該；mustn't不準(zhǔn)，禁止。句意：我的房間很亂，不過今晚在我出去之前，我沒必要打掃它。我可以在(明天)早晨打掃。 4.D 【解析】句意：你肯定是卡羅，這些年你一點(diǎn)也沒有變化。must表示對(duì)現(xiàn)在的肯定推測(cè)。