高一英語情態(tài)動詞的用法

Grammar,課標(biāo)人教實(shí)驗(yàn)版高一Module3Unit1,情態(tài)動詞用法,1)can的主要用法是：A._：eg.Thegirlcandanceverywell.B._：eg.Canthenewsbetrue?C._:eg.CanIsithere?,can和could：,表示能力,表示推測可能性,表請求或允許,（多用于疑問否定句中）,其他用法：表示請求，命令，驚訝，不相信等。Canyouhelpmetoliftit,please?Ifyouwontkeepquiet,youcangetout!Youcantbeserious!,2)could的主要用法是：A._:eg.Weallknewthattheyoungmancouldntbeadoctor.我三歲就能看書了。FathersaidIcouldgooutwithmyfriends.,could是can的過去式,表示過去的能力,許可和推測,B.could可代替can表示請求,語氣委婉,eg.Couldyoulendmeyourbike?CouldIuseyourbike?-Yes，youcan,3表示現(xiàn)在的可能與能力，可能性要小。Whatsfordinner?Icouldeatahorse.Mywifeisinhospital.Ourbabycouldarriveatanytime.4表輕微的責(zé)備。Youcouldbemorecareful.,5)eg.Theycant/couldnthavegoneoutbecausethelightisstillon.,cant/couldnthavedone過否猜,mustdo/be現(xiàn)肯猜cantdo/be現(xiàn)否猜musthavedone過肯猜,must表示推測，語氣非?？隙?，近乎確定的意味，一般用在肯定句。如：Itmustbeelevenoclocknow.Hemustgocrazy.IfMarydidntleavehereuntilfiveoclock,shecantbehomeyet.如果瑪麗五點(diǎn)才離開這兒，他此時(shí)一定還未到家。,may和might：may常用來表示：A._eg.MayIcomein?Yes,please.B._,表示請求、允許;比can正式:,eg.-IbelievethemanisfromEngland.-ButImaybewrong.Theguestmayarrivethisafternoon,表示猜測,答語避免使用may，以免顯得太嚴(yán)肅或太不客氣,Theroadmaybeblocked.這條路可能不通了。Theroadcanbeblocked.這條路可能會是不通的。在疑問句中，表示可能性用can。如：Wherecanhebe?他會在哪呢？,可能性從大到小:must.cancouldmaymight,C._eg.Mayyousucceed!Mayyouhaveagoodjourney!,表示祝愿;語氣較正式:,多在間接引語中表示過去的可能和允許。,也可以表示現(xiàn)在的可能性，但是比may表示的可能性更小，且might可以用于虛擬語氣，may不可以。,might的用法有:Shesaidthathemighttakeherbike.她說他可以拿她的自行車去用。Youmightgetsomehelpfromherifshewerehere.,will和would：,1.Iwilltellyousomethingimportant.我將要告訴你一些重要的事,WillyoutellherthatImhere?請您告訴她說我在這兒，好嗎?Itoldhimnottodoit,buthewould.,（助動詞）,（情態(tài)動詞）,will是助動詞或是情態(tài)動詞用于構(gòu)成將來時(shí)是助動詞。用于表“意志/決心/請求”是情態(tài)動詞。would亦同理，只是表過去。,2._Ifyouwanthelp,letmeknow,willyou?如果你需要幫助,讓我知道,好嗎?Wouldyoutypethis,please?請打印這個(gè)，好嗎？Wontyousitdown?請坐下，好嗎？,疑問句中用于第二人稱，提出請求,表委婉不是表過去,3._Wouldyouhelpus,please?請您幫助我們，好嗎？Idgotherewithyou.我要和你一塊到那兒去。Teacherwouldntallowit.老師不會允許這件事。,（表請求）,would比will客氣委婉。,（表意愿）,（表許可）,shall和should：,1.PerhapsIshallpayavisittoEnglandthiswinter.可能今年冬天我會去英國觀光。（構(gòu)成一般將來時(shí),助動詞）,shall用于構(gòu)成將來時(shí)是助動詞。,（表“決心”，情態(tài)動詞）,Shallwegobytrain,Mom?媽媽，我們乘火車去好嗎？Shallhecomein?要他進(jìn)來嗎？,2.用于征求意見,是情態(tài)動詞,一般用于第一人稱和第三人稱,（表“決心”，情態(tài)動詞）,Dontworrt,youshallgetthebook.Nothingshallstopus.Youshallgetwhatyoudeserve.Heshallbepunishedifhebreakstherule.Nooneshallsmokehere.,2.用于表允諾，決心，警告，命令,或頒布法令規(guī)定等。用于二三人稱。,3.eg:Youshouldkeepyourpromise.你應(yīng)該遵守諾言。Youshouldcallthepolice.*表示“按理說”。Its8oclocknow,heshouldbehereatanymoment.*表埋怨，用于“Shouldnt?”Shouldntyoubedoingyourhomeworknow?,should表示義務(wù)/建議/勸告，意為“應(yīng)該”。,must的主要用法：,1._eg:Wemustalldie.人總要死的。2._eg:Youmustgetupearly.你必須早起來。,表示必然性。,表示強(qiáng)制/義務(wù)。,如：Wemustntwasteourtime.-MayItakethismagazineout?-No,youmustnt.,注意:mustnot:“禁止”。,must用于一般疑問句的時(shí)候，肯定回答用yes,please或者Imafraidso,其否定回答用neednt或者donthaveto,表示推測，意為“一定是”。must+v對現(xiàn)在的推測must+have+過去分詞對過去的推測must+be+v-ing對將來或現(xiàn)在進(jìn)行時(shí)的推測表示“偏偏”，表達(dá)對某事的不滿或責(zé)備等情緒。WhymustitrainonSunday?,-_Igoouttoplay,mum?-No,you_.Youshoulddoyourhomeworkfirst.A.Might;wouldntB.May;hadbetternotC.Must;mustntD.Need;mustnt,B,2.-WhereisEmma?-Icantsayforsurewheresheis,butshe_beoutshopping.A.canB.shouldC.mustD.may,D,3.Theroomisinaterriblemess;it_cleaned.A.canthavebeenB.couldntbeC.mayhavebeenD.wouldbe,A,4.How_yousaythatyoureallyunderstandthewholestoryifyouhavecoveredonlypartofthearticle?A.canB.mustC.needD.may,A,5.There_beanydifficultyaboutpassingtheroadtestsinceyouhavepractisedalotinthedrivingschool.A.mustntB.shantC.shouldntD.neednt,C,6.-JanehasjustcomebackfromChinaandshelookshappy.-She_hertripverymuch.mustenjoyB.musthaveenjoyedC.mayenjoyDshouldhaveenjoyed,B,WhencanIcomefo