广东省惠州市第四中学2017-2018学年英语必修三Unit2Grammar复习教学设计无答案1/4必修三Unit2Grammar教学设计一、复习练习：canmayshallshouldwouldmust1.I_________keepmybalancewhenIlearntorideabike.2.You_______payattentiontoyourdiet.Youaretoofat.3.We________keepquietinthelibrary.4.Tomdoesn'tcometoschooltoday.He_______getill.5.Hepromisedthathe_______getgoodgradesnexttime.6.Ifyoustealthingsagain,you________beputintoprison.二、学习：1.should和oughttoa.should,oughtto都可表示“应该”。oughtto用于表示按道理应当，常指_____________，大多数情况下可用should代替，但比should语气重。Ishouldhelpherbecausesheisintrouble.Yououghttotakecareofthebaby.b.表示劝告、建议或命令时，should和oughtto可通用，但在________中常用should。oughtto的否定式为oughtn’tto或oughtnotto。Youshould/oughttogotoclassrightaway.我可以开窗吗？______________________你不应该离开的这么匆忙。You_____________________(oughtto)leaveinsuchahurry.c.should,oughtto都可表示推测。Heoughtto/shouldbehomebynow.Thisiswheretheoiloughtto/shouldbe.注意：should和oughtto后面跟动词不定式的完成式,其肯定句表示“_______________________”,其否定句则表示“_____________________”。You__________________________thedecisionaweekago.你应该在一周前就做决定。I___________________suchafoolishmistake.我不应该犯这样愚蠢的错误。多数情况下，oughtto可与should互换使用。oughtto的反意疑问句用shouldn’t替代。2.must和havetomust的用法1)表示________________,主要用于________________,意思为“必须⋯⋯，得⋯⋯，要⋯⋯”；由must引起的疑问句，肯定回答要用____________________,否定回答要用_________。don’thaveto,意思是“不必”；2)must的否定形式mustn’t表示_________，意思是“不能，不许”。如：—MustIfinishthetaskrightnow?—Yes,youmust./Yes,youhaveto.(—No,you_______./No,youdon’thaveto.)Youmustn’tcomeherewithoutpermission.haveto的用法广东省惠州市第四中学2017-2018学年英语必修三Unit2Grammar复习教学设计无答案2/41)must表示____________________，而haveto表示一种客观的需要，意思是“不得不”。如：Ihavetoattendanimportantmeetingthisafternoon.Motherisout,soIhavetolookaftertheshop.2)haveto的否定形式是don’thaveto,相当于needn’t。如：Theydon’thavetobuyacomputeratpresent.haveto的第三人称单数形式是hasto，一般过去式是hadto，一般将来式是willhaveto。e.g.LiHuahastopassanexaminationbeforehecanstartwork.Mycarwasbroken,soIhadtowalkhome.It’llhavetobeonaSunday.I’llbeworkingeveryotherday.练习：1、Thebosshasgiveneveryoneaspecialholiday,sowe____gotoworktomorrow.A.can’tB.mustn’tC.needn’tD.shouldn’t2、─Whatdoyouthinkwecandoforouragedparents?─You______doanythingexcepttobewiththemandbeyourself.A.don’thavetoB.oughtn’ttoC.mustn’tD.can’t3.must和needa.need作情态动词时,只能用于_______________。构成否定句和疑问句时不借助于助动词do。—NeedIfinishtheworktoday?—Yes,youmust./No,youneedn’t.b.must的肯定形式表示“__________”，否定式表示“______________”。Youmustcomehere.Youmustn’ttakethebookawayfromthelibrary.need1.情态动词，肯定：否定：2.实义动词，肯定：否定：1.You____tothemeetingthisafternoonifyouhavesomethingimportanttodo.Aneedn’ttocomeBdon’tneedcomeCdon’tneedcomingDneedn’tcomedare敢1.情态动词，肯定：否定：2.实义动词，肯定：否定：1.在晚上我不敢一个人看鬼片。IntheeveningI_______________horrormoviesalone.4、“情态动词＋havedone”结构的用法musthavedone_____________________may/mighthavedone______________________广东省惠州市第四中学2017-2018学年英语必修三Unit2Grammar复习教学设计无答案3/4wouldhavedone___...
