高考英语二轮 情态动词和虚拟语气4课件.ppt

情态动词和虚拟语气 bybringenglish can couldmay mightwill wouldshall shouldmust needhaveto oughttocan t maynotmustn t needn tdon thavetoshouldn t shan tbeabletodare 情态动词 1 can could表示能力hecanspeakenglishverywell hecoulddrawverywellwhenhewasfive 表示许可youcanusemycomputernow youcan teatinclass 表示请求canyoutellmethewaytothepostoffice couldyoushowmethewaytothebeihaipark 表示猜测generally sheisaquietgirl butsometimesshecanbetalkable someoneisknockingatthedoor whocanitbe itcan tbemr zhang hehasgoneabroad thehuntershavebeenlostfordays theycouldstarve 表示惊讶howcanshebelateforclass sheisalwaysontime 2 may might请求许可mayihavealookatyournewmobilephone 表示可能themanovertheremaybeyournewteacher hemightcomeherebytrainorbyair 3 will would表示意愿 倾向onrainydays shewillsitbythewindowandwatchtherainforhours hewaspoor buthewoulddressupasarichman 表示请求willyoupleasegiveyourseattotheoldlady wouldyouliketojoinusfordinner 4 shall用于第一人称 表示将要ishallgowithyounexttime 用于第一人称 表示征求意见shalliputthebookbackontheshelf shallwegooutforawalk 用于第二 三人称 表示许诺 义务 规定 威胁youshallgetanewmobilephoneifyoupasstheexam everyoneshallwaitinlinewhentheybuytickets accordingtotheagreement theinterestshallbedividedequallyamongthethreeinvestors 5 should表示建议 应该 youshouldliedownandhavearest 表示猜测it sseveno clock mr lishouldbethere youhavepracticedalot youshouldn thaveanytroubleinpassingthetest 表示惊讶it ssurprisingthatsuchaprettygirlshouldbeathief 6 must表示必需wemustfinishourworkbynoon 表示猜测theremustbesomethingwrong 表示责怪 偏偏 非得 tom mustyouplaythepianoatthistime mycarmustbreakdownwheniwashurryingtowork 7 need表示需要 否定或疑问句 youneedn tgotoschooltoday 用作实意动词youdon tneedtogotoschooltoday 8 haveto表示必需 不得不youhavetofinishyourworkbynoon 9 oughtto表示应该yououghttohandinyourhomeworkbeforeschoolisover 10 dare表示敢howdareyousaythattoyourmother shedaren tgooutinthedark hedarednotasktheteacherforhelp 用作实意动词hedarestoswimacrosstheriverbyhimself doeshedaretoswimacrosstheriverbyhimself hedoesn tdaretoswimintheriver 注意各种否定式 1 can tican tplayanymusicalinstrument 不能 itcan tbepossible it ssorediculous 不可能 2 mustn tyoumustn tsmokeinpublicplaces 千万别 3 maynotthatmaynotbetrue 可能不 4 needn t 没必要 5 don thaveto 没必要 6 shouldn t 不应该 情态动词 havedone 1 musthavedone一定做过某事2 may might could not havedone可能 没 做过某事3 can thavedone不可能做过某事4 should not havedone本 不 应该做某事5 needn thavedone本没必要做某事6 ought not tohavedone本 不 应该做某事7 would not havedone本 不 会做某事 虚拟语气 一 在条件句中的用法 1 ifiwereyou iwouldasktheteacherforadvice ifheknewthetruth hewouldtellyou 2 ifyouhadcomeearlier youwouldhavemetthefamousstar shewouldn thavebeensoangryifyouhadapologizedtoher 3 ifitweretosnowthisevening theywould should could mightnotgoout ifitshouldbreakdownwithinoneyear wewouldrepairitatourexpense ifyouwentthere iwould should could mightgowithyou 需要注意的问题 1 错综条件句ifyouhadfollowedmyadvice youwoulddoitbetternow ifiwereyou iwouldn thavemissedthefilmlastnight 2 倒装句 省略if weresheolder shewoulddoit shouldhecome tellhimtoringmeup hadwetakenthetaxi wewouldn thavebeenlateforthemeeting 二 介词短语等代替条件从句 withoutair therewouldbenolivingthings butforyourhelp wewouldn thavefinishedthetaskontime 三 根据上下文判定 1 iwouldhavecometoyourparty butiwastoobusylastnight 2 iwastoobusylastnight otherwiseiwouldhavecometoyourparty 3 youweredrivingtoocarelessly otherwiseyouwouldn tbeinhospitalnow 四 在其他从句中的虚拟语气 1 iwishihadmyowncompany iwishiwouldtravelinspacesomeday iwishihadknownyouearlier 2 iwouldratheryoucameheretomorrow iwouldratherihadn tseenthefilm 3 hetalksasifhekneweverything hetalksasifhehadbeentothemoon 4 hesuggested ordered requested that should do 5 it