初中情态动词表推测的用法及练习(经典).doc

初中情态动词表推测的用法及练习(经典).doc

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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.hasgone

2.Wehadawonderfultimeyesterday.You————.Whydidn'tyoucome?

A.hadtocomeB.shouldhavecomeC.mighthavecomeD.musthavecome

3.─Therewerealreadyfivepeopleinthecarbuttheymanagedtotakemeaswell.

─It______acomfortablejourney.

A.can'tbeB.shouldn'tbeC.mustn'thavebeenD.couldn'thavebeen

4.MysistermethimattheGrandTheatreyesterdayafternoon,sohe___yourlecture.

A.couldn'thaveattended B.needn'thaveattended

C.mustn'thaveattended D.shouldn'thaveattended

5.Iwasreallyanxiousaboutyou.You_____homewithoutaword.

A.mustn'tleave B.Shouldn'thaveleft

C.Couldn'thaveleft D.needn'tleave

6.Oh,I’mnotfeelingwellinthestomach,I_____somuchfriedchickenjustnow.

A.shouldn’tcut B.mustn’thaveeaten

C.shouldn’thaveeaten D.mustn’teat

7.Mr.White_____at8:

30forthemeeting,buthedidn’t’showup.

A.shouldhavearrived B.shouldarrive

C.shouldhavehadarrived D.shouldbearriving

8.You______betired-you'veonlybeenworkingforanhour.

A.mustnotB.won't C.can't D.maynot

9.-Isn'tthatAnn'shusbandoverthere?

-No,it_______behim-I'msurehedoesn'twearglasses.

A.can'tB.mustnotC.won'tD.maynot

10.There____beanydifficultyaboutpassingtheroadtestsinceyouhavepractisedalotinthedrivingschool.

A.mustn’t B.shan’t C.shouldn’t D.needn’t

11.Iwasonthehighwaywhenthiscarwentpastfollowedbyapolicecar.They______atlease150kmanhour.

A.shouldhavebeendoingB.musthavebeendoing

C.couldhavedoneD.wouldhavedone

12.He_____havecompletedhiswork;otherwise,hewouldn’tbeenjoyinghimselfbytheseaside.

A.shouldB.mustC.wouldn’tD.can’t

13.----ThewomanbiologiststayedinAfricastudyingwildanimalsfor13yearsbeforeshereturned.----Oh,dear!

She_______alotofdifficulties!

A.maygothroughB.mightgothrough

C.oughttohavegonethroughD.musthavegonethrough

14.Thiscakeisverysweet.You__________alotofsugarinit.

A．shouldput B．couldhaveput C．mightput D．musthaveput

15.—Catherine,Ihavecleanedtheroomforyou.

—Thanks.Youit.Icouldmanageitmyself.

A．needn’tdo B．needn’thavedone C．mustn’tdo D．shouldn’thavedone

16.—Tomisneverlateforwork.Whyisheabsenttoday?

—Something________tohim.

A．musthappen B．shouldhavehappened

C．couldhavehappened D．musthavehappened