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情态动词专项练习1.Jeanhavekepthispromise.Iwonderwhyhechangedhisidea.A.mustB.shouldC.needD.would解析：选B.“shouldhave+过去分词”表示“过去本来应该(但没能)做某事”；keepone’spromise意为“信守诺言”。2.Janehavecometotheparty,butshenotfindtheexacttime.A.could;couldB.might;couldC.should;couldD.should;would解析：选A.“couldhave+过去分词表示过去本来应该(但没能)做某事”。3.Somanymistakesinyourhomework!Youmorecareful.A.maybeB.hadtoC.wouldbeD.shouldhavebeen解析：选D.“Youshouldhavebeenmorecareful”.意为：你本来应该更细心的。4．Herbrotherbeathomenow,becausehewasseenplayingbasketballinthestadiumjustnow.A.mustn’tB.needn’tC.can’tD.shouldn't解析：选C.can’tbeathome意为：不可能在家。5．---Ican’tunderstandwhyourbossislate.---Hetheearlybus.A.couldmissB.mayhavemissedC.canhavemissedD.mightmiss解析：选B.“mayhave+过去分词”表示对过去动作的判断，意为：可能做了某事。注意：can表示可能时，只能用于疑问句和反问句。6.Shedidn'tanswerthephone,she______asleep.A.maybeB.mustbeC.shouldhavebeenD.musthavebeen解析：选D.表示：对过去发生的事情的肯定推测。7．Thelittlegirl’seyeswerered.She______.A.maycryB.mustcryC.mustbecriedD.musthavebeencrying解析：选D.意为：她刚才肯定一直在哭。对过去某事正发生的推测。8．He______hissuppernow,forthedininghallisstillclosed.A.can’tbehavingB.needn’tbehavingC.mustn’tbehavingD.shouldn'tbehaving解析：选A.对现在正在发生的事情的否定推测。9．Iparkedmybikebehindthebuilding,butnowitisgone.It________.A.maybestolenB.mustbestolenC.musthavebeenstolenD.musthavestolen解析：选C.对过去发生的事情的肯定推测的被动式。10.______Mr.Black_______gotoworkbyferrybeforethebridgewasbuilt?A.Did;usedtoB.Use;toC.Did;usetoD.Does;useto解析：选C.usedtodo的疑问式，可以是Used+主语+todo?或Did+主语+usetodo?11.Thehotelisonlyastone’sthrowaway,you______takeabus.A.neednottoB.notneedtoC.don'tneedD.neednot解析：选D.说话人认为不必要乘车,need为情态动词。12.Iambusynow,_______mybrotherdoitforyou?A.WillB.ShallC.MustD.May解析：选B.在疑问句中shall用于第三人称，也表示征求意见。13.---Youneedn’tdoitrightnow,needyou?---YesIamafraidI______.A.needB.needn’tC.mustD.mustn’t解析：选C.Yes的意思是：不。意为：恐怕我必须现在就做。14.MyEnglish-Chinesedictionaryhasdisappeared.Who_____havetakenit?A.shouldB.mustC.couldD.would解析：选C.could/canhavedone用于否定推测和疑问推测。15.---Theroomissodirty._______wecleanit?----Ofcourse.A．WillB.ShallC.WouldD.Do解析：选B.shall用在疑问句中，常用于第一，三人称，表示征求意见或请求指示。16.Ifyouhavesomethingimportanttodo,you______wasteanytime.A.needn’tB.mustn’tC.maynotD.won’t解析：选B.根据句意用mustn’t17.Ifyouwanttoborrowafootballafterschool,yourstudentcard______here.A.hastoleaveB.mustleaveC.hastobeleftD.mustbeleft解析：选C.haveto表示客观需要，must表示主观需要。学生证必须放在此是客观需要。18.“Didyouscoldhimforhiscarelessness?”“Yes,but_____it”A.I’drathernotdoB.I’drathernothavedoneC.Ishouldn’tdoD.I’dbetternotdo解析：选B.wouldrather加完成时表示对完成了的或过去了的事情的态度。意为：当时是不情愿做的。19.“Don’tgetneartoit.Itistoodangerous!”“_______”.A.Yes,Iwon’tB.No,Idon’tC.No,Ican’tD.No,Iwon’t解析：选D.A为错误的表达方式；B和C没有直接回答对方的问候。20.Hemustbeintheclassroom,_______he?A.mustn’tB.can’tC.isn’tD.can解析：选C.对表否定的must进行反意疑问时，要用句子的实义动词21.He________beinthegarden.Hemustbeintheroom.A.can’tB.mustn’tC.willnotD.maynot解析：选A.否定推测用can’t不用mustn’t22.“Doyouhavetoleavenow?”“Iamverysorry,butIreally______.”A.can’tB.haveC.shouldD.must解析：选D.回答haveto的疑问句用must作肯定回答。23.“Let’sgotothelibrary,shallwe?”“_________?”A.No,Ican’tB.Yes,IwillC.Yes,thankyouD.No,we’dbetternot解析：选D.A,B,C都不能回答shallwe,此处D的语气比较婉转客气。24.“CanItakeitaway?”“You______betternot.”A.shouldB.couldC.wouldD.had解析：选D.hadbetter与不带to的不定式构成谓语，可以变成疑问句：Hadn’tyoubetter----25.You_______havebroughtyourcamera.Theyallhadtheirswiththem.A.couldn’tB.needn’tC.wouldn’tD.mustn’t解析：选B.本来不必要做某事.26.Seewhoisthere!______itbeMay?A.MayB.MustC.CanD.Will解析：选C.表推测时A，B都用作疑问句。27.John______beabasketballplayer.Heismuchtooshort.A.mayB.mustn’tC.can’tD.should解析：选C.断然的不定推测用can’t28.TheChineseteacherlookssopale.She______beill.A.mustB.mustn’tC.canD.need解析：选A.表示有把握的肯定推测用must29.Something______tosaveourearth.Doyouthinkso?A.candoB.mustdoC.hastodoD.mustbedone解析：选D.“somethingmustbedone”意为：必须采取措施。30.Lookatwhatyouhavedone!You______bemorecareful.A.oughtB.canC.wouldD.should解析：选D.ought后应用to31.—HasLiLinstarted?Hesaidhewouldjoinintheparty.—He______.Heisamanofkeepinghisword.A.couldhaveleftB.musthaveleftC.can’tcomeD.won’tbecoming解析：B。从Heisamanofkeepinghisword中可以看出，李林肯定已经出发来参加聚会了，这是对已经发生的事情非常肯定的推测，故用musthavedone。注意must表推测时，不能用于否定句和疑问句中。32.—MayIparkmycarhere?—No,you______.Nocarisallowedtoparkhere.A.maynotB.needn’tC.mustn’tD.daren’t解析：C。此题考查以情态动词提问的一般疑问句的回答。在英语中，以某些情态动词提问的句子，出于礼貌委婉或句意的需要，回答时，要换用另一个情态动词。在回答must开头的一般疑问句时，肯定回答用must，否定回答用needn’t或don’thaveto；在回答may开头的一般疑问句时，肯定回答用may，否定回答用mustn’t；在回答need开头的一般疑问句时，肯定回答用must，否定回答用needn’t。33.—Excuseme,couldyoutellmewheretheYajiaSupermarketis?—It’stwoblocksstraightahead.You______missit.A.mustn’tB.can’tC.needn’tD.shouldn’t解析：B。根据题意，此处需要表示“推测”的否定结构，故can’t为正确答案。4.A。这是一个省略句，couldn’thavedone表示对过去发生的动作的否定推测，意为“不可能……”。34.—IsawMr.SunatTongyuStationthismorning.—You______.He’sstillonholidayinHawaii.A.couldn’thaveB.mustn’thaveC.shouldn’tD.needn’t解析：A。这是一个省略句，couldn’thavedone表示对过去发生的动作的否定推测，意为“不可能……”。35.—HowaboutpayingavisittoDr.Wang,ourformerChineseteacher?—Goodidea.Iwille-mailhimtodaysothathe______know______toexpectus.A.shall;whyB.could;whenC.would;whatD.will;how解析：B。这是一个综合题。本题sothat后的目的状语从句中的谓语动词要用“情态动词（may/might/can/could）+动词原形”。Whentoexpectus表示“我们什么时候可到达”。“疑问词+不定式”结构在句中作know的宾语。36.Everythinghastwosides.Beautif