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1、语法模块1:情态动词(上)can/could必修3的语法模块4.表示“推测”,用于否定句、疑问句或感叹句中情态动词can/could,may/might,must/haveto,need,shall,例:Canthisbetrue?情态should/oughtto,will/would,dare等词义和用法辨析Itcan’tbetrue.动词5.couldhavedone:本可以做…(实际上没做)情态动词在情景中的用法和易错点总结对过去的推测,用于否定句、疑问句或感叹句名词性主语从句和表语从句例:Youcouldhavedoneitbetter.【例1】(2011浙江卷,11)从句宾语从句
2、和同位语从句,名词性从句连词的选择-How’syournewbabysitter?can/could-We___askforabetterone.Allourkidslovehersomuch.1.表示“能力”A.shouldB.mightC.mustn’tD.couldn’t例:Canyouplaytheviolin?2.表示“允许”,could表示更加委婉的语气【例2】(2008福建,24)例:-CouldIsmokehere?–Yes,youcan.ItisusuallywarminmyhometowninMarch,butit___berathercold3.表示“有时可能”,用于
3、肯定句中sometimes.例:Littleboyscanbeveryannoyingsometimes.A.mustB.canC.shouldD.would【例3】(2012北京,33)【例4】Sincewe’renotinahurry,we___waitforthenextbusasthisoneisWe___thedifficultytogether,butwhydidn’tyoutellme?muchtoocrowded.A.shouldfaceB.mightfaceA.mightwellB.mightaswellC.couldwellD.shouldaswellC.couldha
4、vefacedD.musthavefacemustmay/might1.表示“必须”,强调主观上的必须。haveto不得不,强调客观,有时态上的各种变化。1.表示“允许”,用于肯定句和疑问句,might语气委婉例:Idon’tliketostayanylonger,Imustleavenow.例:-MayIaskyouaquestion?It’stoolate,Ihavetoleavenow.-Yes,youcan./No,youcan’t.2.mustn’t表示“禁止”,2.表示“推测”,一般不用于疑问句中否定句中若要表示“不必”,用needn’t例:Youmightberight,bu
5、tI’mnotsure.例:-Mustwefinishtheworktoday?-Yes,youmust./No,youneedn’t./No,youdon’thaveto.3.mighthavedone表示对过去的推测,或“本可以做…”3.表示“一定是”,可能性很高的推测。例:That’stoodangerous.Youmighthavekilledyourself.4.mayaswell/mightaswell最好,只好=hadbetter例:Hemustbein,forthelightison.maywell/mightwell很可能,极有可能4.表示“偏要,非要”,指令人不快的事。
6、1【例5】(2011辽宁卷,21)【例6】(2008温州八校联合三模)Ifyou___go,atleastwaituntilthestormisover.-Jackiesaysshecan’thelpbecauseshe’sgotalotofworkon.A.canB.mayC.mustD.will-Well,she___saythat;shealwaysusesthatexcuse.will/wouldA.shouldB.mayC.canD.would1.表示主观意愿或决心,可用于一、二、三人称。【例7】(2013全国卷1,29)例:Ifyou’llhelpme,Iwillgowithy
7、ou.Thedoor___open,nomatterhowhardshepushed.2.表示请求,用于第二人称,would语气更委婉。A.shouldn’tB.couldn’tC.wouldn’tD.mightn’t例:Wouldyoumindclosingthedoor?3.表示习惯性的动作或倾向,“总是,常常”例:WhenIwasalittlechild,Iwouldgoswimmingwithotherchild