高一语法之_情态动词

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1、情态动词一、情态动词（情态动词表示说话人的看法和态度。）①情态动词自身都有一定的词义。②情态动词不能在句子中单独作谓语。③情态动词没有人称和数的变化。二、情态动词的基本用法1、can/could(1)表示能力HecanspeakEnglishbetterthanyou.（2）表示允许Youcan(may)gohomenow（3）表示推测(用于疑问句和否定句)CanthisgreenbikebeLiuDong's?注：can和beableto都可表示能力，两者在意思上没有什么区别。但是can只能有现在式

2、和过去式（could），而beableto则有更多的形式，另外，表示经过努力而成功办到的事，只能用beableto(4)can和could还可表示可能性，并且表示委婉语气时，可用could代替can。这时could不再是can的过去式。如：Couldyoucomeagaintomorrow?Accidentscanhappenonsuchrainydays.(5)can表示疑问、惊讶的语气。Howcanyoubesoclever?6)can可表达“有时可能会……”。如：Itisusuallywarmi

3、nmyhometowninMarch,butit___berathercoldsometimes.A.mustB.canC.shouldD.wouldEx:1)---CouldIborrowyourdictionary?---Yes,ofcourseyou____.A.mightB.willC.canD.should2)Thefirespreadthroughthehotelveryquicklybuteveryone____getout.A.hadtoB.wouldC.couldD.wasablet

4、o3)-Willyoustayforlunch?-Sorry,__.Mybrotheriscomingtoseeme.A.Imustn'tB.Ican'tC.Ineedn'tD.Iwon't4)MayIstopmycarhere?No,you_＿＿＿.A.can'tB.mustn'tC.needn'tD.don'thaveto5)（2014北京卷）27.________Ihaveawordwithyou?Itwon’ttakelong.A.CanB.MustC.ShallD.Should6)（2014

5、大纲卷）30.Althoughyou_____findbargainsinLondon,it’snotgenerallyacheapplacetoshop.A.shouldB.needC.mustD.can7)【2012全国II】17.I’mgoingtoEuropeonvacationtogetherwithJohnifI_______findthemoney.A.canB.mightC.wouldD.need2、may和might(1)表示许可（might是may的过去式;用在疑问中比may委婉、

6、客气。）如：MayIusethisdictionary?（2）把握不太大的推测（肯定句）Peter____comewithustonight,butheisn’tverysureyet.A.mayB.canC.willD.must注：can(用于疑问句和否定句)比较：①Thiscan’tbedonebyhim.②Thismightnotbedonebyhim.（3）祈使句表祝愿(4)mayaswell+动词原形译为：“最好，不妨”Youmayaswelldoitatonce.Ex:1）.Ihaveaw

7、ordwiththemanager,sir?A.WillB.WouldC.MayD.Can2）—MayIuseyourcamerathisSunday?   —No,you.A.needn’tB.maynotC.won’tD.mustn’t3）—AreyoucomingtoJeff’sparty?—I’mnotsure.I_____gototheconcertinstead.A.mustB.shouldC.wouldD.might4)—IhearyouhavegotasetofvaluableAust

8、raliancoins._____Ihavealook?   —Yes,certainly.A.DoB.MayC.ShallD.Should5)8.—IsJohncomingbytrain?—Heshould,buthe______not.Helikesdrivinghiscar.A.mustB.canC.needD.may6）（2014江西卷）30.Lifeisunpredictable;eventhepoorest__becometherichest