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1、情态动词练习情态动词can/couldwill/wouldmay/mightmustshallshouldneedoughtto/havetodare基本用法1.情动+动词原形hadbetter2.没有人称和数的变化(除“haveto”外).3.否定式:+notoughtnottocancould1.表“能力”（体力,脑力或技术)Canyouliftthisheavybox?Icouldn’tunderstandwhathesaidatall.2.表“许可”“建议,请求”Youcanuseadifferentmaterialinstead.Couldyouhelpme
2、carrythebox?3.表“推测”“可能性”No,no,itcan’tbetrue.Whatonearthcanthismean?can与could用法对比Wethoughtthestorycouldn’tbetrue./Howcouldyoubesocareless?4.can’tcouldn’t+have+P.P表示对过去的否定推测他不可能去过那个小镇。Hecouldn’thavebeentothattown.她不可能做这样愚蠢的事.Shecan’thavedonesuchafoolishthing.Hecouldhavefinishedthetaskont
3、ime,buttheheavysnowcame.5.could+have+P.P:表示本来能做得到,但事实上未做到.6.Can+have+done：一般用在疑问句中表推测1.Youdon’thavetoknowthenameoftheauthortofindabook.You___findthebookbythetitle.(08湖南）mustB.needC.canD.would2.Peter____bereallydifficultattimeseventhoughhe’sanicepersoningeneral.(08辽宁）A.shallB.shouldC.can
4、D.must3.Ifitwerenotforthefactthatshe____sing,Iwouldinvitehertotheparty.A.couldn’tB.shouldn’tC.can’tD.mightnot1.----Ican’tfindmypurseanywhere(08重庆）----You_____havelostitwhileshopping.A.mayB.canC.shouldD.would3.Liza______wellnotwanttogoonthetrip----shehatestraveling.(08全国卷II）A.willB.canC.
5、mustD.may1.Theteacher____havethoughtJohnsonwasworthitorshewouldn’thavewastedtimeonhim,Isuppose.(07安徽）A.shouldB.canC.wouldD.must2.Incrowdedplaceslikeairportsandrailwaystations,You____takecareofyourluggage.(07北京）A.canB.mayC.mustD.willmust与haveto用法对比musthaveto1.表必须(主观看法)必须;没有过去式,可用于间接引语中.H
6、etoldmeImustdoaccordingtowhathesaid.(客观需要)不得不;有多种时态.-It’srainingheavily,wecan’tgonow.-Ithinkwe’llhavetowaittilltherainstops.2.疑问句及答语中MustI…?Yes,youmust.(一定)No,youneedn’t.No,youdon’thavetoDoyouhavetogotoday?Yes,wedo.否定句:Youdon’thavetoworryaboutthat.①Youmustbehungrynow,_________?=I’msurey
7、ouarehungrynow.②HemustbewatchingTVnow,______?=I’msureheiswatchingTVnow.③Tommusthavelivedhereforalongtime,_______?=I’msureTomhaslivedhereforalongtime.④Shemusthavearrivedyesterday,__________?=I’msureshearrivedyesterday.*陈述部分的must表示“一定”,“想必”等推测意义时,要根据陈述部分的不定式结构,在附加疑问部分采用与其相适应的主动词或
