人教版高中英语必修3教案：Unit2Period3

情态动词ModalVerb

情态动词有一定的意义，但没有人称和数的变化，不能独立使用，它和后面的动词构成谓语．除ought

和have

外，后面只能接不带to

的不定式。

只作情态动词的can/could,may/might,

oughtto,must

可情态可实义的need,dare

可情态可助动词的shall/should,will/would相当于情态动词的haveto,usedtoEveryoneherecanspeakEnglish.---CouldIhavealookatyournotebook?---Yes,youcan./No,

you

can't.

Itcan’tbeMary.Shehasfallenill.Canthisnewsbetrue?Wherecantheybe?Shecan’thaveleftschool,forherbikeisstillhere.Themonkeyslooksweet,buttheycanbeverynaughty.Shecan/isabletosingthesonginEnglish.I

could

read

when

I

was

four.

Thefirespreadthroughthehotelquicklybuteveryone

wasabletogetout.情态动词含义否定式

注意点can/could表能力“能，会”can’t“不会，不能”区别

beableto表许可“可以”can’t“不可以，不许”代替may表推测“可能”can’t“不可能”主要用于否定、疑问句中1表示某人通过努力克服困难做成某事,要用was/wereableto.2could,might,would表委婉语气用于疑问句,答语仍须用

can,may,will.3can用于肯定句中,可表示”有时可能”---MayIuseyourpencil?---Yes,youmay./No,youmustn’t.Shemaynotbeworkingnow.Johnmightbeathomenow.Helenmaygoonthetripwithus,butsheisn’tverysureyet.Shemay/mighthavereaditinthepaper.Hemaynothavefinishedreadingthebook.情态动词含义否定式

注意点may/might表许可“可以”mustn’t“不许，严禁”口语中也可用can’t表推测“可能”Maynot“可能不”主要用于肯定句，不能用在疑问句

（maynot可能不）IfyouwillhelpmewithmyEnglish,Iwillbeveryhappy.IpromisedthatIwoulddomybest.Willyoutellmesomethingaboutyourhometown?Wouldyoupleasespeakagainmoreslowly？Hewillalwaystakeawalkaftersupper.Duringthevacationhewouldoftenvisitme.情态动词

用法will表请求(第二人称)表意志,意愿表某种倾向或习惯would更客气的请求过去的意志,意愿过去的倾向或习惯Shallwesetoffnow?YoushalldoasIsay.Tellhimthatheshallhavethebooktomorrow.Youshallbepunishedifyoudothatagain.Youshouldn’t/oughtn’ttosmokesomuch.Sheshouldn’thaveleftwithoutsayingaword.It’sfiveo’clock.Johnshouldbeathomenow.Wehavepreparedafridgeoffoodanddrinks.Thatoughttobeenoughfortheparty.It’sapitythatheshouldbesorudetoalady.情态动词

用法shall征求对方意见(第一,三人称)表示命令,警告,威胁或允诺(第二,三人称)should/oughtto表示劝告,建议,命令或责任“应该,必须”表示推测,

“理应,估计,大概,可望”should还可表示“竟然”---Must

I

finish

all

assignments

at

a

time?---Yes,youmust./No,

you

needn't.

Idon’tlikethisTVset.Wemustbuyanewone.Therewasnomorebus.Theyhadtowalkhome.You

must

be

the

new

teacher.

There

is

nobody

here.

They

must

have

allgone

home.MyMP4isn’tinmybag.WherecanIhaveputit?John,lookatthetime.Mustyouplaythepianoatsuchalatehour?情态动词含义否定式注意点must表必要“必须”needn’t“不必”(区别

haveto)有时表“偏要”表推测“一定”can’t“不可能”只能用于肯定句，不能用于否定、疑问句1.Acomputer______thinkforitself;itmustbetoldwhattodo.A.can’tB.couldn’tC.maynotD.mightnot2.Thefirespreadthroughthehotelveryquicklybuteveryone______getout.A.hadtoB.wouldC.couldD.wasabletoAD4.Thatbigcinema______seat2,000people.A.canB.shouldC.oughttoD.isabletoA5.—CouldIborrowyourdictionary?—Yes,ofcourseyou_______.A.mightB.willC.canD.should6.—MightIwatchTVaftersupper?—Yes,you________.A.mayB.mustC.mightD.canCA7.You______returnthebooknow.Youcankeepittillnextweekifyoulike.A.can’tB.mustn’tC.needn’tD.maynot8.Johnny,you______playwiththeknife,you______hurtyourself.A.won’t;can’tB.mustn’t;mayC.shouldn’t;mustD.can’t;shouldn’tCB9.--Willyoustayforlunch?--Sorry,_____.Mybrotheriscomingtoseeme.A.Imustn’tB.Ican’tC.Ineedn’tD.Iwon’t10.--MayIpickaflowerinthegarden?--________.A.No,youneedn’tB.Not,please.C.No,youmustn’tD.No,youwon’tBC11.Putonmoreclothes.You

befeelingcoldwithonlyashirton.

A.can

B.could

C.must

D.would12."MustIdrivetohishouseandpickupthechildren?"

"No,

."

A.youshouldn't

B.youmightnot

C.youneedn't

D.youmustn'tCC13.Wedidn'tseeTomatthemeetingyesterday.He

it.

A.mustn'thaveattended

B.cannothaveattended

C.needn'thaveattended

D.wouldhavenotattended14.We

playchessthanbridge.Someofusdon'tknowhowtoplaybridge.

A.hadbetter

B.wouldbetter

C.wouldrather

D.hadratherBA15.Thereissomeoneknockingatthedoor.

itbeTom?

A.Can

B.Must

C.Should

D.Oughtto16.Twoyearago,myhusbandboughtmeabicycle.Ifyouliveintown,itisoftenfasterthanacarandyou

worryaboutparking.

A.mustnot

B.maynot

C.shouldnot

D.don'thavetoAD17.---IsJohncomingbytrain?---Heshould,buthe____not.Helikesdrivinghiscar.A.mustB.canC.needD.may19.---Iheardtheywentskiinginthemountainslastwinter.---It____truebecausetherewaslittlesnowthere.A.maynotbeB.won’tbeC.couldn’tbeD.mustn’tbeDC全国高考试题回放1.Aleft-luggageofficeisaplacewherebags____beleftforashorttime,especiallyatarailwaystation.A.shouldB.canC.mustD.will2.How___yousaythatyoureallyunderstandthewholestoryifyouhavecoveredonlypartofthearticle?A.canB.mustC.needD.may3.—Theroomissodirty._____wecleanit?—Ofcourse.A.WillB.ShallC.WouldD.DoBAB4.MyEnglish-Chinesedictionaryhasdisappeared.Who___havetakenit?A.shouldB.mustC.couldD.would5.—IsJohncomingbytrain?—Heshould,buthe____not.Helikesdrivinghiscar.A.mustB.canC.needD.may6.—Iheardtheywentskiinginthemountainslastwinter.--It____truebecausetherewaslittlesnowthere.A.maynotbeB.won’tbeC.could’tbeD.mustn’tbeCDC10.Iwasreallyanxiousaboutyou.You___homewithoutaword.A.mustn’tleaveB.shouldn’thaveleftC.couldn’thaveleftD.needn’tleave11.Youcan’timaginethatawell-behavedgentlemen___besorudetoalady.A.mightB.needC.shouldD.would12.—Writetomewhenyougethome.—__________.A.ImustB.IshouldC.IwillD.IcanBCC13.Mr.Bushisontimeforeverything.How___itbethathewaslatefortheopeningceremony?A.canB.shouldC.mayD.must14.—AreyoucomingtoJeff’sparty?—I’mnotsure.I___gototheconcertinstead.A.mustB.wouldC.shouldD.might15.MysistermethimattheGrandTheatreyesterdayafternoon,sohe___yourlecture.A.couldn’thaveattendedB.needn’thaveattendedC.mustn’thaveattendedD.shouldn’thaveattendedADA16.Sorry,I’mlate.I____haveturnedoffthealarmclockandgonebacktosleepagain.A.mightB.shouldC.canD.will17.Therewasalotoffunatyesterday’sparty.You___come,butwhydidn’tyou?A.musthaveB.shouldC.needhaveD.oughttohave18.—WhencanIcomeforthephotos?Ineedthemtomorrowafternoon.—They___bereadybyby12:00.A.canB.shouldC.mightD.needADB19.—IstayedatahotelwhileinNewYork.--Oh,didyou?You___withBarbara.A.couldhavestayedB.couldstayC.wouldstayD.musthavestayed20.Thefirespreadthroughthehotelveryquicklybuteveryone____getout.A.hadtoB.wouldC.wasabletoD.could21.Jack___yet,otherwisehewouldhavetelephonedme.A.mustn’thavearrivedB.shouldn’thavearrivedC.can’thavearrivedD.needn’thavearrivedACC22.Whenhewasthere,he___gotothatcoffeeshopatthecornerafterworkeveryday.A.wouldB.shouldC.hadbetterD.might23.Sir,you___besittinginthiswaitingroom.Itisforwomanandchildrenonly.A.oughtn’ttoB.can’tC.won’tD.needn’t24.It’snearlyseveno’clock.Jack___behereatanymoment.A.mustB.needC.shouldD.canAAC25.ItoldSallyhowtogethere,butperhapsI____forher.A.hadtowriteitoutB.musthavewrittenitoutC.shouldhavewrittenitoutD.oughttowriteitout26.Michael___beapoliceman,forheismuchtooshort.A.needn’tB.can’tC.shouldD.mayC