情態動詞練習情態動詞can/couldwill/wouldmay/mightmustshallshouldneedoughtto/havetodare基本用法1.情動+動詞原形hadbetter2.沒有人稱和數的變化(除“haveto”外).

3.否定式:+notoughtnotto

cancould1.表“能力”（體力,腦力或技術)Canyouliftthisheavybox?Icouldn’tunderstandwhathesaidatall.2.表“許可”“建議,請求”Youcanuseadifferentmaterialinstead.Couldyouhelpmecarrythebox?3.表“推測”“可能性”No,no,itcan’tbetrue.Whatonearthcanthismean?can與could用法對比

Wethoughtthestorycouldn’tbetrue./Howcouldyoubesocareless?1.Youdon’thavetoknowthenameoftheauthortofindabook.You___findthebookbythetitle.(08湖南）mustB.need

C.can

D.would2.Peter____bereallydifficultattimeseventhoughhe’sanicepersoningeneral.(08遼寧）A.shall

B.should

C.can

D.must3.Ifitwerenotforthefactthatshe____sing,Iwouldinvitehertotheparty.A.couldn’t

B.shouldn’t

C.can’t

D.mightnot1.----Ican’tfindmypurseanywhere(08重慶）----You_____havelostitwhileshopping.A.mayB.canC.shouldD.would3.Liza______wellnotwanttogoonthetrip----shehatestraveling.(08全國卷II）A.willB.canC.mustD.may1.Becareful,youmightbreaktheglass.2.Hemaybebusygettingreadyforhistrip.a.may(might)+V.表示對現在或將來事情的猜測.(might比may可能性更小一些.)Hemay(might)haveplayedelectricgameonTVthewholenight.(Forhelooksverysleepy.)b.may(might)+have+P.P,表示對過去事情的猜測,認為某事“可能”發生.(might比may更含蓄,或更不肯定.)1.-----Ihearyou’vegotasetofvuluableAustraliancoins.______ihavealook-----Yes,certainly.(02北京）doB.may

C.shall

D.should2.-----AreyoucomingtoJeff’sparty-----I’mnotsure.i______gototheconcertinstead.（00全國）mustB.would

C.should

D.might3.Helen____goonthetripwithus,butsheisn’tquitesureyet.(05安徽）A.shallB.must

C.may

D.canmust與haveto用法對比musthaveto1.表必須(主觀看法)必須;沒有過去式,可用于間接引語中.HetoldmeImustdoaccordingtowhathesaid.(客觀需要)不得不;有多種時態.-It’srainingheavily,wecan’tgonow.-Ithinkwe’llhavetowaittilltherainstops.2.疑問句及答語中MustI…?Yes,youmust.(一定)No,youneedn’t.No,youdon’thaveto

Doyouhavetogotoday?Yes,we

do.否定句:Youdon’t

havetoworryaboutthat.1.----MayIsmokehere-----Ifyou_____,chooseaseatinthesmokingsection.(06山東）ShouldB.couldC.mayD.must2.He____havecompletedhiswork;otherwise,he

wouldn’tbeenjoyinghimselfbytheseaside.A.should

B.must

C.wouldn’t

D.can’t3.Tom,you______leaveallyourclothesonthefloorlikethis!(05河南）A.wouldn’tB.mustn’t

C.needn’t

D.maynotshould與shall用法對比shouldshall1.表“應當”表示勸告,建議Youshouldlistentothedoctor’sadvice.2.表可能的猜測Theyshouldgethomebynow.作情態動詞,用于第一、三人稱表示征求對方意見或請求Shallwebeginourlesson?

Shallhegooutforawalk?用于第二、三人稱，表示允諾、警告、威脅、命令、決心等。Youshallhaveanicepresentforyourbirthday.(允諾)1.Ithasbeenannouncedthatcandidates________remainintheirseatsuntilallthepapershavebeencollected.(02上海）canB.will

C.may

D.shall2.----Writetomewhenyougetthere.----________.(01北京）ImustB.ishouldC.iwillD.ican3.---Theroomissodirty._____wecleanit---Ofcourse.A.will

B.shall

C.would

D.do1.----Idon’tmindtellingyouwhatIknow.-----You_________,I’mnotaskingyouforit.(04江蘇）mustn’tB.maynotC.can’t

D.needn’t2.Iwonderhowhe__thattotheteacher.（95上海）A.daretosayB.daresayingC.notdaresayD.daredsay3.Youdon’t_____togothereifyouhavenotime.(97上海）A.needB.want

C.must

D.oughtNeed與dare用法對比needdare1.情態動詞+V*疑問式*否定式Heneednot(needn’t)go.Needwedoitagain?No,youneedn’tdoitagain.Dareshegooutaloneatnight?HowdareyousayIamunfair?Hedarenotsayso.2.need/

dare+todo*肯定式*否定式*疑問式Heneedstogo.Hedoesn’tneedtogo.Doesheneedtodoitagain?Hedarestosay.Hedoesnotdare(to)say.Ifyoudaretojumpintothewaterfromhere,sodareI.1.Althoughthis_____soundlikeasimpletask,greatcareisneeded.(08四川）A.mustB.mayC.shallD.should2.MyEnglish-Chinesedictionaryhasdisappeared.Who_________havetakenitA.shouldB.mustC.couldD.would3.Accordingtotheairtrafficrules,you____switchoffyourmobilephonebeforeboarding.(08上海）A.mayB.canC.wouldD.should4.You___behungryalready---youhadlunchonlytwohourago!(08浙江）A.wouln’tB.can’tC.mustn’tD.needn’t9.Itoldyourfriendhowtogettothehotel,butperhapsI______havedrivenherthere.(07陜西）A.couldB.mustC.mightD.should10.----how’syourtouraroundtheNorthLake?Isitbeautif