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情态动词(Revision)Learningtargets1.Toreviewmodalverbs2.ToconsolidatewhatwillbereviewedStep1:Revision情态动词的特点常考情态动词情态动词的归类（词义）情态动词表推测情态动词表虚拟情态动词易错常考点一、情态动词的特点1.表说话人的语气，态度或看法；2.有一定词义，但不能单独做谓语，需+v才能构成谓语;3.一般有现在式或过去式（注：过去式未必表过去，有时可表示语气委婉或可能性小）二、情态动词有：现在过去canmaywillshallmustoughttoneeddarecouldwouldmightdaredshould三、常见用法归类2.表请求许可或征求意见：may,might,can,couldwill,would,shall3.表可能：can,might,may,could,shoulde.g.(1)ItcanbecoldinMarch.(2)Hemaynotgotothepartytonight.e.g.(1)Willyoudomeafavor?(2)Shallwebeginourclass?(3)MayIcomein?1.表能力：can,could(过去)e.g.Youcan’tfindabetterplacethanit.4.表命令：must,shalle.g.Ithasbeenannouncedthatcandidatesshallremainintheirseatsuntilallthepapershavebeencollected.5.表义务：must,shall,should(oughtto)e.g.(1)Youmustworkhard.(注：haveto)(2)Asstudents,weshoulddothehomeworkbyourselves.6.表禁止：mustn’t,can’t,shan’te.g.(1)Youcan’tparkthecarhere.(2)Youmustn’tgooutaloneatnight.7.表推测：must,may,might,could(肯定)can,can’t,couldn’t(否定或疑问)e.g.(1)Itmusthaverainedlastnight,didn’tit?(2)Theycan’tbeplayingbasketball,aren’tthey?(3)Hecouldbeonhiswayhomenow.(4)Mr.Smithisontimeforeverything.Howcanhebelateforthemeeting?关键：（1）时态（2）可能性大小（3）肯/否定句还是疑问句8.表虚拟（含if的主从复合句中及相关名词性从句中）时时间间谓语动词形式谓语动词形式ifif从句从句主句主句现现在在过过去去将将来来(1)动词过去式动词过去式（（bebe多用多用werweree））would/should/could/would/should/could/might+might+动词原形动词原形would/should/could/would/should/could/might+might+havedonehavedonewould/should/could/would/should/could/might+might+动词原形动词原形hadhaddonedone1.1.动词过去式动词过去式2.2.weretodoweretodo3.3.shoulddoshoulddo注意：1.时态2.情态动词词义辨析e.g.(1)IfIhadtime,Iwould_______(attend)themeeting.(2)Ifyou__________(take)myadvice,youwouldnothavefailedintheexams.(3)Ifitweretoraintomorrow,thesportsmeetingwould______(be)putoff.attendhadtakenbe(2)用于名词性从句中(should+do)i.suggest/advise/propose/recommend/insist/order+从句主语+(should)+doii.It’simportant/necessary/natural/strange…that+从句主语+should+doiii.It’shigh/abouttimethat+从句主语+shoulddo/dide.g.(1)Theysuggestedthathe___________(take)exerciseregularly.(2)Itisimportantthathe___________(follow)hisparents’advice.(3)Itwashightimethatwe_____________(have)lunch.shouldtakeshouldfollowshouldhave/hadcould/mighthavedonemayhavedonemusthavedonecan’t/couldn’thavedoneshould/oughttohavedoneneedn’thavedonewouldhavedonewouldrather(not)havedonewouldlike/lovetohavedone①过去可能做过②过去本能够/可以做过去可能做过过去肯定做过过去不可能做过过去本应该做过去本没必要做过去本来会做1.情态动词+havedone的用法易错常考点宁愿过去（没）做了某事过去本想做但没做成2.特殊用法①can’thelpdo不能帮助做can’thelpdoing情不自禁做某事②may/mightaswelldo到不如，不妨做③can’t/couldn’t…too/enough再……也不为过④Maysb.do.表祝愿⑤must偏偏，非要⑥should按照常理推断…；竟然、居然⑦shall用于1,3人称,表示征求对方的意见；用于2,3人称,表示命令,警告,威胁,承诺。3.will&would,usedto1）will________________________would______________________usedto__________________2）will表示意志，决心或愿望。3）will用于第二人称征求意见。经常性、习惯性、倾向性过去的习惯性过去常常，现在不4.need&dare实义动词&情态...