资源描述：
《“情态动词+have_done”结构用法小结.ppt》由会员上传分享，免费在线阅读，更多相关内容在教育资源-天天文库。
1、情态动词用法归纳情态动词无人称和数的变化；不能单独使用，必须与其后的动词原形构成谓语Should/oughttodare/need情态动词+havedone用法总结1)should,oughtto表示“应该”，oughtto表示义务或责任，比should语气重。1.Ishouldhelpherbecausesheisintrouble.2.Yououghttotakecareofthebaby.2)表示劝告、建议和命令。should,oughtto可通用，但在疑问句中常用should。1.Youshould/o
2、ughttogotoclassrightaway.2.ShouldIopenthewindow?should,oughtto3)表示推测should,oughtto(客观推测),must(主观推测)。1.Hemustbehomebynow.(断定他已到家)2.Heoughtto/shouldbehomebynow.(不太肯定)3.Thisiswheretheoilmustbe.(直爽)4.Thisiswheretheoiloughtto/shouldbe.(含蓄)should,oughttodare,need1
3、)dare作情态动词用时,常用于疑问句、否定句和条件从句中,过去式形式为dared。1．HowdareyousayI’munfair?2．Hedaren’tspeakEnglishbeforesuchacrowd,darehe?3．Ifwedarednotgotherethatday，wecouldn’tgetthebeautifulflowers.2)need作情态动词用时,常用于疑问句、否定句。在肯定句中一般用must,haveto,oughtto,should代替。1．Youneedn’tcomesoea
4、rly.2.----NeedIfinishtheworktoday?----Yes,youmust./No,youneedn’t.dare,need3)dare和need作实义动词用时，有人称、时态和数的变化。在肯定句中，dare后面常接带to的不定式。在疑问句和否定句中，dare后面可接带to或不带to的不定式。而need后面只能接带to的不定式。1.Idaretoswimacrossthisriver.2.Hedoesn’tdare(to)answer.3.Heneedstofinishhishomewor
5、ktoday.“情态动词+havedone”结构用法小结“情态动词+havedone”结构用法小结课文原句：1.tellhim/herthathe/sheshouldhavestudied,…2.FrederickWilliamⅠ,thekingofPrussia,couldneverhaveimaginedthathisgreatestgifttotheRussianpeoplewouldhavesuchanamazinghistory.重庆市垫江中学周洋“情态动词+havedone”结构用法小结考题感知：1
6、.She___haveleftschool.Forherbikeisstillhere.(天津·６)A.can’tB.wouldn’tC.shouldn’tD.needn’t“情态动词+havedone”结构用法小结2.–Ican’tfindmypurseanywhere.–You___havelostitwhileshoping.(重庆·３０)A.mayB.canC.shouldD.would“情态动词+havedone”结构用法小结3.Whatapity!Consideringhisabilityandex
7、perience,he___better.(江西·２６)A.needhavedoneB.musthavedoneC.canhavedoneD.mighthavedone“情态动词+havedone”结构用法小结考题感知：1.She___haveleftschool.Forherbikeisstillhere.(天津·６)A.can’tB.wouldn’tC.shouldn’tD.needn’tA,can’thavedonesth表示：“不可能做了某事”，对过去的否定推测，把握较大。“情态动词+havedone”
8、结构用法小结2.–Ican’tfindmypurseanywhere.–You___havelostitwhileshoping.(重庆·３０)A.mayB.canC.shouldD.wouldA,mayhavedonesth表示：“可能做了某事”，对过去情况的推测，把握较小。“情态动词+havedone”结构用法小结3.Whatapity!Consideringhisabilitya
