情态动词常见考点

一、can/may/must/need问句的回答方式Can/Couldyoudosth.Yes,I/wecan/could.No,I/wecan’t/couldn’t.MayIdosth.?Yes,No,youMustI/wedosth.?Yes,NoyouNeedIdosth.?Yes,No,you疑问句式肯定句式否定答式youmay.mustn’t/maynot.needn’t/don’thaveto.needn’t/don’thaveto.youmustyoumust.二、情态动词+havedone：表示对过去发生的事进行推测,可表示“推测”、“责备”、“怀疑”等多种意义。1.musthavedone2.may/mighthavedone3.wouldratherhavedone4.couldhavedone5.couldn’thavedone6.should/oughttohavedone7.shoudn’t/oughtn’ttohavedone8.needn’thavedone肯定做了本想做但没做本可以做但没做不可能做了本该做但没做本不必做但做了本不该做但做了可能已做了三、need和dare:行为动词VS情态动词情态动词(+dosth.)行为动词.needdare1.无人称和数的变化;2.尤其用于：*否定句及疑问句中(常以needn't和daren't的形式出现);*在if/whether之后;*或与hardly,never,noone,nobody连用;多用于肯定句:sb.needtododaretodosth.needtobedonesth.needdoingIdaren’taskherforarise.我不敢请求她加薪.Howdidyoudaretotellherthat?Iwonderwhetherhedarestandupinpublic.Idon’tknowhowshedarestowearthatdress.Doyouneedanyhelp?Iwonderwhetherheneedsenditimmediately.Ineedhardlytellyouthattheworkisdangerous.Thegardendoesn’tneedwateringatthemoment.Youneedn’tfinishthatworktoday.判断正误:Howdareyousaysuchathing?Howdareyoutosaysuchathing?Hedaren’ttospeakEnglishbeforesuchacrowd,didhe?Hedaren’tspeakEnglishbeforesuchacrowd,darehe?Nobodyneedtobeafraidofthis.Nobodyneedbeafraidofthis.Thesedishesneedbecleanedcarefully.Thesedishesneedtobecleanedcarefully.Thesedishesneedcleaningcarefully.注意对need问句的回答:--NeedIfinishtheworktoday?--Yes,________________.No,________________.No,________________.youmustyouneedn’tyoudon’thavetoneedn’t对其它情态动词的回答:--ShallItellJohnaboutit?--No,you__________.--Mustwedoitnow?--No,you__________.needn’t/don’thavetoneedn’t/don’thaveto1.-Shelooksveryhappy.She__havepassedtheexam.-Iguessso.It’snotdifficultafterall.A.shouldB.couldC.mustD.might2.She___haveleftschool,forherbikeisstillhere.A.can’tB.wouldn’tC.shouldn’tD.needn’t3.It’snearlyseveno’clock.Jack___behereatanymoment.A.mustB.needC.shouldD.couldCADCB4.You______returnthebooknow.Youcankeepittillnextweekifyoulike.A.can’tB.mustn’tC.needn’tD.maynot5.Johnny,you______playwiththeknife,you______hurtyourself.A.won’t;can’tB.mustn’t;mayC.shouldn’t;mustD.can’t;shouldn’t6.Ididn’thearthephone.I___asleepA.mustbeB.musthavebeenC.shouldbeD.shouldhavebeenB7.-I’msorry.I___atyoutheotherday.-Forgetit.Iwasabitoutofcontrolmyself.A.shouldn’tshoutB.shouldn’thaveshoutedC.mustn’tshoutD.mustn’thaveshouted8.-Catherine,Ihavecleanedtheroomforyou.-Thanks.You____it.Icouldmanageitmyself.A.needn’tdoB.needn’thavedoneC.mustn’tdoD.shouldn’thavedone9.You__theexam,butyouspentallyourtimeplaying.A.canpassB.couldhavepassedC.couldpassD.canhavepassedBBBBC10.--Willyoustayforlunch?--Sorry,_____.Mybrotheriscomingtoseeme.A.Imustn’tB.Ican’tC.Ineedn’tD.Iwon’t11.--MayIpickaflowerinthegarden?--________.A.No,youneedn’tB.Not,please.C.No,youmustn’tD.No,youwon’t部分情态动词的否定式mustn’t不准,禁止needn’t没必要(=don’thaveto)can’t不能;不可能maynot不可以;可能不shouldn’t不应该(=oughtnotto)