1、1).表示体力或脑力方面的能力;2).表示允许、可能性。could 是 can 的过去式,表示过去有能力及过去存在的可能性;用于疑问句表示委婉地提出问题。1)Thefirespreadthroughthehotelveryquicklybuteveryone_getout.(NMET97)A.hadtoB.wouldC.couldD.wasableto2)-Willyoustayforlunch?-Sorry,_.Mybrotheriscomingtoseeme.(NMET99)A.ImustntB.IcantC.IneedntD.Iwont2.may 表示询问或说明一件事可不可做;表示某事有
2、可能发生。might 是 may的过去式;用在疑问中比 may 委婉、客气。1)-MayItakethisbookoutofthereading-room?-No,youmustnt.(Yes,youmay.)2)-MightImakeasuggestion?-Yes,youmay.3.must1).表示必须要做的事:必须2)表示很有把握的推断:一定,准是。have(has)to:have(has)gotto 必须,不得不。过去式:hadto3)-MustIgettothestationbeforethreeoclock?-Yes,youmust.(No,youneednt.)4)Imafra
3、idyouwillhavetowaitawhile.5)Shemustbeintheclassroomnow.6)Mary_beinParis,Isawherintownonlyafewminutesago.(NMET94)A.mustntB.shouldntC.cantD.maynot4.shall1)在疑问句中,用于第一、三人称表示说话人征求对方的意见或向对方请求。2)用于二、三人称,表示说话人给对方的命令、警告、允诺等概念。1)-ShallIplaceanorderwithyounow?-No,youneednt.-Shallheturndowntheradioabit?-Yes,ple
4、ase.(No,pleasedont.)2)YoushallhavetheEnglishbookassoonasIfinishit.3)Everythingthatheownsshallbetakenawayfromhim.4)Yourbrotherseldomcomestoseeyou,_?A.doesheB.doesntheC.willheD.isnthe5)Itsafineday.Letsgofishing,_?A.wontweB.willweC.dontweD.shallwe5.should 应该;应当1)Youshouldlistentothedoctorsadvice.2)Yous
5、houldstudythearticlecarefully.6.will,would1)在疑问句中用于第二人称,表示说话人向对方提出请求或询问。用 would语气更加婉转。2)will 表示现在的习惯性动作或状态;would 表示过去的习惯性动作或状态。3)will 用于各种人称,表示意志、意愿、决心、允诺;would 表示过去时间的意志、意愿、.。(1)Dontsmokeinthemeetingroom,_you?A.doyouB.willyouC.canyouD.couldyou-Willyoucomewithme?-Yes,Iwill.(Iamsorry,Icant.)(2)-Would
6、youtellussomethingaboutyourself?-Yes,Iwill.(3)-Itsmybirthdaytomorrow.Dontforgettocometomyparty.-_.A.IdontB.IwontC.IcantD.Ihaven7.oughtto 应该;1)Yououghtnttosmoketoomuch.2)She_forwhatshehasdone.A.oughttopraiseB.oughtbepraisedC.oughttohavepraisedD.oughttobepraise8.dare1.daretocome2.darecome1)Hedarenotte
7、llthetruth.2)Hedoesntdaretocomeoutatnight.3)Idontknowwhetherhe_try.A.dareB.needsC.wantsD.isallowed9.need1).作为情态动词:2).作为实义动词:需要A.主语是人 need(todosomething;tobedonebysomebody)B.主语是事物 need(doing;tobedone)1)-Dotheyneedtotakeanybookswiththem?-No,theydontneedto.2)-Needwebuyanynewequipment?-No,weneednt.3)Thi
8、sfarmtoolneedsrepairing.Thisfarmtoolneedstoberepaired.4)-ShallItellJohnaboutit?-No,you_.Ivetoldhimalready.A.needntB.wouldntC.mustntD.shouldnt5)Itsafineday.You_takearaincoatwithyou.A.cantB.mustntC.needntD.maynot情态动词+不定式的完成式是高考的考试要点1、musthavedone,“一定做过/一定已经”,表示对过去情况极大把握地推测,仅用于肯定句2、may/mighthavedone 也许
9、做过某事(推测);本来可以做某事却没做3、canthavedone 为否定句或疑问句,对过去的推测“不可能,一定没做过某事”couldhavedone 本来可以做某事却没做4.neednthavedone 表示”不必要做某事,但做了”,而 needntdo 则表示”不必做(也没做)”5.、oughtto/shouldhavedone 表示”本来应当做的却没做”oughtnt/shouldnthavedone 本来不应该做某事却做了6、would/could/might/should+havedone 用来表示与过去事实相反的虚拟语气7、wouldratherhavedone 表示”当时宁愿做了
10、某事”,否定形式:wouldrathernothavedonee.g.IfIhadbeenfreethatday,Iwouldhavegonewithyou.8、wouldlike/lovetohavedone 表示”本想做某事”而实际上未做。考点二名词性从句(unit3,unit4)主语从句名词性从句宾语从句表语从句同位语从句ThatthecollegewiUtakeinmorenewstudentsthisyearistrue今年这所大学将招收更多新生是真的。Whetherhecanfinishhistaskontimeisofgreatimportance他是否能按时完成任务非常重要。特
11、别提示(1)if 不能引导主语从句。(2)形式主语 it 替代主语从句。常见的 it 替代主语从句的句式主要有以下几种:AIt+系动词+形容词+that 从句。如:Itisquiteclearthatthewholeprojectisdoomedtofailure注:在句型“Itisimportant(necessary,strange,natural)that.”中,that 后面的从句中的谓语动词用:should+动词原形Itsnecessarythatweshouldhaveawalknow.BIt+系动词+名词+that 从句。Itisourhopethatthetwosideswil
12、lworktowardspeace我们的希望是双方能朝着和平的方向发展。在 Itisdemanded/suggested/ordered/required.that-clause 句型中从句用(should)+动词原型Itisdemandedthatweshouldworkoutaplan.CIt+be+ved 形式+that 从句。Itisannouncedthattheplanhasbeensuccessfullycarriedout据宣布计划已经顺利实施。在 Itisapity/ashame/nowonderthat.句型中从句也常用(should)+动词原型Itsapitythatyo
13、u(should)missagoodchance2连接代词引导Whatwecantgetseemsbetterthanwhatwealreadyhave我们得不到的东西似乎比我们拥有的东西好。whotheletterwasfromisstillunknown这封信是谁寄出的还不清楚。Whicheverofyougetsherefirstwillgettheprize你们当中第一个到达这里的人将获得奖项。3连接副词引导Howacupuncturereducesandrelievespainisunclear针灸是如何减轻和解除疼痛的还不清楚。whydinosaurssuddenlydisappearedstillremainsamystery恐龙为什幺突然消失了还是个谜。Ithink(that)youshouldturntotheteacherforhelp我认为你应该向老师寻求帮助。Idontknowif/whetherhestillliveshereaftersomanyyears我不知道这幺多年后他是否还住在这儿。whether/if 都意为“是否”。一般情况
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