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1、......情态动词一、情态动词的特点:1.没有人称和数的变化。2.有些情态动词有过去式的变化:e.g.will→would,can→could,may→might, dare→dared二、情态动词的否定式:情态动词+not+动词原形cannot:can't,mustnot:mustn't,neednot:needn't三、情态动词的用法及相互区别,是考试的内容之一。1.can,beableto beableto表示经过努力后,能够做到;beableto有多种形式的变化。can 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
2、去存在的可能性;用于疑问句表示委婉地提出问题。1)Thefirespreadthroughthehotelveryquicklybuteveryone____getout. A.hadto B.would C.could D.wasableto2)-Willyoustayforlunch? -Sorry,__.Mybrotheriscomingtoseeme.A.Imustn't B.Ican't C.Ineedn't D.Iwon't2.may表示询问或说明一件事可不可做;表示某事有可能发生。might是may的过去式;用在疑问中比may委婉、客气。1)-MayItak
3、ethisbookoutofthereading-room?-No,youmustn't. (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)-MustIgettothestationbeforethreeo'clock?-Yes,youmust.(No,youneedn't.)4)I'mafraidyouwillhavetowaitawhile.5
4、)Shemustbeintheclassroomnow.6)Mary____beinParis,Isawherintownonlyafewminutesago.A.mustn't B.shouldn't C.can't D.maynot4.shall 1)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,youneedn’t.学习好帮手......-Shallheturndowntheradioabit? -Ye
5、s,please.(No,pleasedon't.)2)YoushallhavetheEnglishbookassoonasIfinishit.3)Everythingthatheownsshallbetakenawayfromhim.4)Yourbrotherseldomcomestoseeyou,____?A.doeshe B.doesn'the C.willhe D.isn'the5)It'safineday.Let'sgofishing,____?A.won'twe B.willwe C.don'twe D.shallwe5.should 应
6、该;应当1)Youshouldlistentothedoctor'sadvice.2)Youshouldstudythearticlecarefully.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)Don'tsmokeinthemeetingroom,___you? A.doyouB.willyou C.canyou D.could
7、you-Willyoucomewithme? -Yes,Iwill.(Iamsorry,Ican't.)(2)-Wouldyoutellussomethingaboutyourself? -Yes,Iwill.(3)-It'smybirthdaytomorrow.Don'tforgettocometomyparty.-_____.A.Idon't B.Iwon't C.Ican't D.Ihaven't7.o
