初中情态动词表推测的用法及练习(经典)

情态动词表推测的用法（一）情态动词表推测的三种句式(can不肯,may不问must肯定不否问)1.在肯定句中一般用must(一定)，may（可能），might（也许，或许）。（1）ThephotomustbeLu’s,thosemustbetheirparents.（2）Thepolicemanmayknowthewaytothatschool.（3）ThenotebookmaybelongtoJim,it’sonhisdesk.（4）Ifyouhaveanyideawhereitmightbe,pleasecallme.2.否定句中用can’t/couldn’t(不可能),maynot/mightnot(可能不)。（1）Itcan’t/couldn’tbetheheadmaster.HehasgonetoAmerica.这不可能是校长，他去美国了。（2）Thedoctormaynot/mightnotbeinthehospitalnow,It’snearlysixo’clock.3.疑问句中用can/could(能……?)。（1）Couldhehavefinishedthetask?他可能把任务完成了吗？（2）Canhebeathomenow?他现在能在家吗？注：以上三种句式中情态动词的语气按程度都是依次递减的。might,could并非may,can的过去式，而表示语气较为委婉或可能性较小。（二）情态动词表推测的三种时态1.对现在正在进行的动作推测时，用“情态动词+be+doing”。例：Hemust/may/might/couldbelisteningtotheradionow.他一定/可能/也许正在听收音机。2.对一般情况的推测，“情态动词+动词原形”。（1）Hecan’t(couldn’t)/may(might)notbeathomeatthistime.这个时候他不可能/可能不在家。（2）Mr.Bushisontimeforeverything，hecan’t(couldn’t)belateforthemeeting布什先生一向准时，这次会议他不可能迟到。3.对过去情况的推测，用“情态动词+have+过去分词”。（1）Itmust/may/might/couldhaverainedlastnight.Thegroundiswet.地湿了，昨晚肯定/可能/也许下雨了。（2）Thedoorwaslocked.Hecan(could)not/may(might)nothavebeenathome.门锁着，他不可能/可能不在家。（3）Can/Couldhehavegottenthebook？难道他找到书了吗？1.Look!Thelightisoutinherroom.She————tobedalready.A.mustgoB.hadtogoC.musthavegoneD.hasgone2.Wehadawonderfultimeyesterday.You————.Whydidn'tyoucome?A.hadtocomeB.shouldhavecomeC.mighthavecomeD.musthavecome3.─Therewerealreadyfivepeopleinthecarbuttheymanagedtotakemeaswell.─It______acomfortablejourney.A.can'tbeB.shouldn'tbeC.mustn'thavebeenD.couldn'thavebeen4.MysistermethimattheGrandTheatreyesterdayafternoon,sohe___yourlecture.A.couldn'thaveattendedB.needn'thaveattendedC.mustn'thaveattendedD.shouldn'thaveattended5.Iwasreallyanxiousaboutyou.You_____homewithoutaword.A.mustn'tleaveB.Shouldn'thaveleftC.Couldn'thaveleftD.needn'tleave6.Oh,I’mnotfeelingwellinthestomach,I_____somuchfriedchickenjustnow.A.shouldn’tcutB.mustn’thaveeatenC.shouldn’thaveeatenD.mustn’teat7.Mr.White_____at8:30forthemeeting,buthedidn’t’showup.A.shouldhavearrivedB.shouldarriveC.shouldhavehadarrivedD.shouldbearriving8.You______betired-you'veonlybeenworkingforanhour.A.mustnotB.won'tC.can'tD.maynot9.-Isn'tthatAnn'shusbandoverthere?-No,it_______behim-I'msurehedoesn'twearglasses.A.can'tB.mustnotC.won'tD.maynot10.There____beanydifficultyaboutpassingtheroadtestsinceyouhavepractisedalotinthedrivingschool.A.mustn’tB.shan’tC.shouldn’tD.needn’t11.Iwasonthehighwaywhenthiscarwentpastfollowedbyapolicecar.They______atlease150kmanhour.A.shouldhavebeendoingB.musthavebeendoingC.couldhavedoneD.wouldhavedone12.He_____havecompletedhiswork;otherwise,hewouldn’tbeenjoyinghimselfbytheseaside.A.shouldB.mustC.wouldn’tD.can’t13.----ThewomanbiologiststayedinAfricastudyingwildanimalsfor13yearsbeforeshereturned.----Oh,dear!She_______alotofdifficulties!A.maygothroughB.mightgothroughC.oughttohavegonethroughD.musthavegonethrough14.Thiscakeisverysweet.You__________alotofsugarinit.A．shouldputB．couldhaveputC．mightputD．musthaveput15.—Catherine,Ihavecleanedtheroomforyou.—Thanks.Youit.Icouldmanageitmyself.A．needn’tdoB．needn’thavedoneC．mustn’tdoD．shouldn’thavedone16.—Tomisneverlateforwork.Whyisheabsenttoday?—Something________tohim.A．musthappenB．shouldhavehappenedC．couldhavehappenedD．musthavehappened