情态动词can-may-must-need及练习(共8页)

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1、精选优质文档-倾情为你奉上考点二：情态动词can 的用法，表示某人能做某事。肯定句：主语+can+动词原形+其他I can play the piano .否定句：主语+can +not(cant)+动词原形+其他I can not (cant) play the piano .一般疑问句：Can +主语+动词原形+其他?Can you play the piano?特殊疑问句：特殊疑问词+ can +主语+动词原形+其他?What can you play ?can play the piano情态动词must,can,could,may,might 表推测的用法：情态动词中的must,ca

2、n,could,may,might都表推测。其中must的可能性最大，can/could次之，may/might最小。具体用法如下：1.must的用法 （1）表示推测“可能性”时，意思是“一定、准是”，语气较肯定，较有把握。HemustbeAmerican.=ItiscertainthatheisAmerican.他准是个美国人。（2）must表推测只能用于肯定句。如果要表示“一定不、肯定不”的意思时，应用cant,如询问某种可能时，应用can。 Hemustknowmyaddress.他肯定知道我的地址。（一定）Hecantknowmyaddress.他肯定不知道我的地址。（一定不）Canh

3、eknowmyaddress?他知道我的地址吗？（询问可能性）（3）must表示推测时，可以推测现在/正在发生的动作/过去发生的动作。Hemusthaveacarnow.（现在）他一定有辆小汽车。Hemustbedoinghisexercisesintheclassroom.（正在进行）他一定在教室里做练习。Hemusthavefinishedthework.（过去发生）他一定已完成了工作。注：must表示推测时很少用于将来的情况。一般不用Hemustcometomorrow.可用Itscertain/Imsurethathewillcometomorrow. （4）在反意疑问句中，当附属部分

4、含有表示推测意义的must时，疑问部分的助动词应与must后面的动词在非推测情况下的用法保持一致。Hemustbeaworker,isnthe?（现在）他准时个工人，是吗？Itmusthaverainedlastnight,didntit?（过去）昨晚一定下雨了，是不是？YoumusthavelearnedEnglishformanyyears,haventyou?（完成时）你一定学了好多年英语，是吗？ 2.can/could的用法（1）can表示推测“可能性”时，往往用于否定句或疑问句。Cant“一定不”，语气很肯定。can在疑问句中意思是“会、可能”。 Hecantbeathome.=It

5、isimpossiblethatheisathome.他一定不在家。（2）can/cant后可接进行时/完成时，表示对现在发生的动作或过去发生的动作进行推测。Theycantbereadinginthelibrary.他们一定不在图书馆读书。HecanthavegonetoShanghaiforIsawhimaminuteago.他不可能去了上海，我刚才还看见他。 Itssolate.Wherecanshehavegone?天晚了，她可能去哪儿了呢？ （3）在反意疑问句中，当陈述部分含有表示推测意义的cant时，疑问部分的助动词应与cant后面的动词在非推测情况下的用法保持一致.Hecantb

6、eateacher,ishe?他不是教师，是吗？Shecanthavefinishedherhomework,hasshe?她一定没有完成家庭作业，是不是？（4）could可用于表示某事有可能发生或可能是事实。Donteatit.Itcouldbepoisonous.不要吃它，可能有毒。Theplanecouldbedelayedbyfog.飞机可能会因为雾晚点。（5）could还可以用于表示客气、委婉、礼貌的请求语气。Excuseme,couldyoutellmethewaytothebusstation?Couldyouhelpme? （6）couldnt表示否定推测，表示某事不可能真实，

7、或由于特定事实或环境某事肯定不会发生。Itcouldntpossiblybepoison.这不可能是毒药。 注：有时与形容词的比较级连用强调某人或某物不可能再更多地具有某种属性。Youcouldntbemorewrong.你真是大错特错。Icouldntbehappier.我简直是幸福极了。3.may和might的用法（1）may,might表示推测“可能性”时，意思是“可能”、“也许”，语气没有must肯定。 Hemay/mightbeAmerican.=ItispossiblethatheisAmerican.他可能是个美国人。 注：might不表示过去时态，只是语气上比may更委婉，表示

8、的可能性更小。（2）may,might表推测时，可以用于否定句，意思是“可能不、也许不”，但不用于疑问句。 Hemay/mightnotbeathome.他也许不在家。（3）may,might可以推测现在正在发生的动作或过去发生的动作。Hemay/mightbesleepingnow.现在）他可能正在睡觉。Theboymay/mightnotbewatchingTVathome.（现在）这个男孩可能没在家看电视 Thesestudentsmay/mighthaveseenthefilmbefore.（过去）这些学生以前可能看过这部电影。（4）may,might还可以推测将来的情况。 Ithin

9、kweshouldtakeraincoatwithus,itmayrain.我想我们应该带上雨衣，可能要下雨了。Shemightnotcomethisafternoon.她今天下午可能不来了。Exercises:Completethesentencesusing“must”or“cant”.1.Ihavetriedtocallhimattheoffice,butthereisnoreply.Hebeathome.2.Theyhaveboughtanewcar.Theyhavealotofmoney.3.SheiscarryingaJapanesenewspaper.ShebeChinese.4

10、.Hegoesabroadalot,Hehaveanimportantjob. 5.Sheisaprofessorattheuniversity.Shebeveryclever. 6.SheisactinginaShakespeareplaytomorrow.Shebeanactress.【随堂练习】一.选择填空 1.Ithoughtyou_likesomethingtoread.SoIhavebroughtyousomebook.A.ought B.might C.could D.must 2.ThatmanmustbeSarahshusband.-No,he_beherhusband.Sh

11、eisstillsingle.A.cant B.mustnt C.maynot D.oughtto 3.Peter_comewithustonight,butheisntverysure.A.must B.may C.can D.will4.What_itbe? -It_beamailbox,foritismoving.It_beacar.A.can;cant;must B.can;can;must C.can;mustnt;must D.must;mustnt;can5.Look,someoneiscoming.Guess_.-Jack.Hesalwaysontime.A.whocanitb

12、e B.whohemayC.whohecanbe D.whoitcanbe 6.IsawMaryinthelibraryyesterday.-You_her.Sheisstillabroad. A.mustntsee B.canthaveseenC.mustnthaveseen D.couldntsee 7.David,you_playwiththevaluablebottle,you_breakit.A.wont;cantB.mustnt;may C.shouldnt;mustD.cant;shouldnt 8.SusanrefusestomarryJacknow.She_hermind.A

13、.mustchange B.shouldhavechanged C.musthavechanged D.wouldhavechanged 9.Sue_cometogetherwithustonight,butsheisntverysureyet.A.mustB.mayC.needD.will 10.AuntMargaret_therain,otherwiseshewouldhavearrivedherebynow.A.musthavemissedB.shouldhavemissedC.hadmissedD.mightmiss 1Who is the man over there? Is it

14、Mr. Wu? It _ him, but I am not quite sure.A. may be B. maybe C. is D. must be2Some people feel sick when they read a book in a car or on a boatAmustBshouldCmayDneed3-Must I go to medical school and be doctor like you，Dad？- No, you _, son. Youre free to make your own decision. A. cant B. mustnt C. sh

15、ouldnt D. dont have to考点：考查情态动词辨析。4You be hungry after the long walk. Help yourself to some cakes.A. should B. must C. need to D. ought to5Could you please_ the piano so loudly? Your brother is having a rest now.A. not to play B. not play C. dont play D. to not play6 That pink T-shirt with Ping Ans

16、picture on it _belong to Miss Ma. She admires him a lot. No, it _ be hers. She hates pink colour.A. must, cant B. may, cant C. can, mustnt D. must, mustnt7-Must I answer it in English?-No, you _. You can use Chinese.A. shouldnt B. cant C. mustnt D. neednt8- _ we go swimming in Xishuanghu Lake today?

17、 - Oh, no. Its _ cold to swim on such days. I will catch a cold. A. Will; very B. Will; too C. Shall; very D. Shall; too 9People who drink wine _ to drive after May Day.A.dont allow B.isnt allowed C.mustnt allow D. mustnt be allowed10I was asked to attend the meeting before eight.Oh, you_. Im sorry

18、for not telling you that we have changed the plan.A. must B. cant C. may D. neednt11You have worked for a long time. You _ be very tired. A. must B. cant C. could D. mustnt12-Can I ask you a question? - No, you_. You _to ask me questions during exams.A. cant, mustnt B. cant, arent supposed C. can, a

19、rent supposed D.can, dont have 13What _you do if you _ in Grade 7 now?A. could, are B. would, are C. could, was D. would, were 【答案】D 14This CD _ belong to Bill. It has his name on it.A. mustnt B. might C. cant D. must【答案】D 15You drive your car so fast. Its dangerous.A. wouldnt B. shouldnt C. couldnt

20、 D. mightnt【答案】B 16-Shall we meet at the station at 8 a.m? -In fact we_.The train _until 10a.m.A.mustnt ;doesnt leave B.mustnt ;leaves C.neednt ;wont leave D.neednt;will leave【答案】C 17-Mum,_ I watch TV? -No. Unless your homework _.A. could; finishes B. can; will finish C. may; is finished D. can; wil

21、l be finished【答案】C【18 Look! A man is cutting a tree on the moon. -It _ be true. The teacher said there is no air on the moon.A. cant B. may not C. shouldnt D. mustnt【答案】A19_ you please play tennis with me? Sorry, I _.A. Could; cantB. Could; couldnt C. Can; dont D. Can; couldnt【答案】A20-I broke the win

22、dow. -You_ play football near the window.A.should B. shouldnt C. had better【答案】B21_you swim? Yes，but Im not a good swimmer.A. CanB. MayC. NeedD. Must【答案】A 22Is the woman over there Miss White? It _ be her. Shes gone to Hangzhou.A. must B. cant C. neednt D. may【答案】B23 Can your friend sing?-_.A.Yes,I

23、can B.Yes, he can C.No,she can D.No,I cant 【答案】B。24- Where is Kate ? -_she is cleaning the classroom. A. May B. May be C. Maybe D. Can 【答案】C【解析】25She _ come to the party, but I am not quite sure.A. wouldB. shouldC. mightD. must【答案】C【26- Are you coming to Davys party, Kate ?- Im not sure, I _ go to t

24、he movies instead.A. would B. should C. might D. must【答案】C27Its the library! So you_ make any noise here.A. mustnt B. wont C. need D. may【答案】A【解析】28Look at the sign! It says “No Smoking!” You _ smoke here. Its dangerous.A. mustntB. ought not toC. needntD. dont have to【答案】A29 -May I watch TV now, Mum

25、? -No, you_. You_ do your homework first.A. dont; must B. dont; cant C: cant, must D. cant; can【答案】C30 Theres somebody at the door. Who _ it be? Is it the postman ?No, it _ be him. Its just seven oclock. Its too early.A. may, cantB. will, wont C. may, mustnt D. must, may not【答案】A31-_ you sing an Eng

26、lish song?- Yes, I can.A. Can B. May C. Must D. Need【答案】A32Is John coming by train?He should, but he not. He likes driving his car, but Im not quite sure.A. must B. can C. may D. need【答案】C33“Wheres my book? I cant find it”.“It _ on your desk.”A. may be B. maybe C. maybe is D. may is 【答案】A二.用must/can

27、/could/may/might正确形式填空.1.CouldIborrowyourdictionary?-Yes,ofcourseyou_. 2.Shedoesntanswerthebell.She_beasleep.3.Thegroundiswet.It_haverainedlastnight. 4.Heiswritingwithapencil.He_havelosthispen.5.Acomputerthinkforitself,it_betoldwhattodo.6.Thereismuchgashere,you_smokehere.7.Washepresentatthemeeting? -He_nothaveattendedit,forhewasbusyrepairinghiscarallthetime. 8.Look!Anoldmanislyinginthemiddleofthestreet.He_behurtinanaccident.9.Nobodysawheratthemeetingyesterday,she_havespokenatthemeeting10.Mygoodness.Ijustmissedthetrain. -Thatstoobad.Iamsureyou_havecaughtit,ifyouhadhurried.专心-专注-专业