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情态动词.docx

情态动词

情态动词：

情态动词没有人称和数的变化，情态动词后必须跟动词原形。

can的用法：

1.表示能力Shecanswimfast,butIcan’t.

2.表示推测，“可能”，用于否定句和疑问句中，can’t译为“不可能”。

Canitbeourteacher?

那个人有可能是我们老师吗？

—No,itcan’tbeourteacher.

3.could的用法1.can的过去式，意为“能、会”，表示过去的能力。

Hecouldwritepoemswhenhewas10.

4.could在疑问句中，表示委婉的语气。

CouldIuseyourpen?

我能用一下你的钢笔吗?

—Yes,youcan.可以

may的用法:

1.表示请求、许可，比can正式MayIborrowyourbike?

（maynot）

2.表示推测“可能，或许”，一般用于肯定句中。

Itmayraintomorrow.

3.may的过去式为might，表示推测时。

可能性低于may。

Heisawayfromschool.Hemightbesick.

4.对may引出的问句，回答：

Yes,youmay./Ofcourse./Certainly/Sure.　No,youmaynot./No,youcan’t.

5.表示希望、祈求、祝愿，常可译为“祝愿”。

通常是用may+主+VMayyousucceed！

祝你成功！

must的用法:

1.表示主观看法，意为“必须、一定”。

Youmuststayhere.

2.mustn’t表示“禁止,不许”.Youmustn'tplaywithfire.你不许玩火。

3.对must的疑问句，肯回must，否回needn’t或don’thaveto.

MustIfinishmyhomework?

—No,youneedn’t.

4.must表示有把握的推测，用于肯定句Thelightison,sohemustbeathome.

need的用法:

1.need表示需要、必须，用于否定句和疑问句中，

2.其否定形式为needn't，意为“没有必要，不必”。

3.用need提问时，肯定回答为must，否定回答为needn’t或don’thaveto

NeedIstayhereanylonger?

Yes,youmust.—No.youneedn’t/don’thaveto.

4.need还可以作动词，此时有人称、数和时态的变化，needtodo

Heneedstodoitrightnow.他需要马上做这件事

should的用法:

1.should意为“应该”，可表示劝告、建议、义务、责任等。

Weshouldwaitforthegreenlight.

shall的用法:

shall表示征求对方意见（多用于第一人称）Shallwegooutforawalk?

我们出去散步好吗？

其回答方式有以下几种：

Yes,please.　Allright.　No,thankyou.

can和may区别:

1.can和may均可用来征求意见或许可，意为“可以”，一般可互换使用。

如：

Can/MayIhelpyou?

2.2.can和may表示可能性时的区别：

1）在肯定句中用might，may，must，不用can

2）在疑问句中表示推测用can，不用might，may，must

3）在否定句中用can’t（不可能），不用may，must。

Shemaybeintheclassroom.她可能在教室里。

Wherecantheybenow?

他们现在可能在哪儿？

Thatcan'tbetrue.那不可能是真的。

havetodo不得不

I/You/They/We/（don't）havetodrinkwater.hadtodo/didn'thavetodo/willhavetodo

He/She/It/Tomhastodrinkwater.He/She/It/Tomdoesn'thavetodrinkwater.

hadbetterdo最好做某事

I'd=IhadShe'd=ShehadI/You/They/We/He/She/It/Tomhadbetter（not）gohome

ExerciseA

回答下列问题:

（1）Ican’tfindmypen.MayIuseyourpen?

_____________________

（2）Canyouspeakloudlyinthereadingroom?

_____________________

（3）Canyougettoschoolat8o’clock?

_____________________

（4）Mustwekeepourclassroomclean?

_____________________

（5）Needyoudomorningexerciseseveryday?

_____________________

（6）Mustyouhandinyourhomeworkontime?

______________________

（7）Canyouleaveschoolatthree?

______________________

（8）Canyoueatordrinkinclass?

______________________

（9）MayIhavealookatyourEnglishbook?

______________________

（10）CanyouspeakChineseinanEnglishclass?

______________________

写出下列否定形式的意思

mustn't_________maynot_________needn't_________can't______________

Fillintheblankswith"may（not）,need（n't）,should（n't）"intheirproperforms.

1.Sheisillathome.Ithinkyou________helpherwithherlessonslater.

2.A:

_________Ibuyfilmticketsforyou?

No,you___________.

3.A:

_________Iaskforleavethedayaftertomorrow?

Yes,you___________.

4.A:

Linda,you’repooratmaths.You_________studyharder.B:

OK.I’lldomybest.

5.You__________nottalkinclassandyou_________listencarefully.

6.A:

__________Ireturnthebooktoyoutoday?

No,you_________.You__________keepittilltomorrow.

7.A:

___________wedomorehealthyreadingafterschool?

Yes,you____________.

8.A:

___________Iborrowthisbook?

I’mafraidyou___________.Thereisonlyonecopyinthelibrary.

9.A:

___________wefinishhomeworkinclass?

No,you__________.

Fillintheblankswith"may,must,can,can't,should"intheirproperforms：

1.“______yourbrotherspeakEnglishverywell,too?

”No,he______.”

2.“______youplaytennis?

”“Yes,I______.”

3.Theboxisveryheavy.Tom______moveit.

4.“Whataboutseeinganewfilmthisevening?

”

“I’mafraidI______.I______finishmyEnglishexercisesthisevening.”

5.Thisfishwon’tkeepfresh,we______eatitnow.

6.You______startnow,oryou’llbelate.

7.Excuseme,sir.______Iaskyouaquestion,please?

Fillintheblankswith"mustn't,needn't"intheirproperforms：

1.You______writetomeifyoudon’thavethetime.

2.You______hurry.I’msureyouwon’tbelate.

3.You______forgettowritetomewhenyouarrivethere.

4.Jane,you______playwiththeknife.It’sverydangerous.

5.–MustIgetthereontimetoday?

–No,you______.

6.Timeisflying.We______wasteourtime.

7.You______beafraidofthedifficulty.We’llgiveyouahelpinghand.

8.–“MustIhandinthemathsexercisestomorrow?

”

--No,you______.Youmayhanditinthedayaftertomorrow.

9.Tom,you______readinthesun.It’snotgoodforyoureyes.

10.You______worrysomuch.I’msurehe’llbewellsoon.

Fillintheblankswithmodalverbsintheirproperforms：

1.Nobody____livewithoutairandwater．

2.--_____hespeakChinese?

--Yes，alittle．

3.Thebook_____bereturnedbeforeSaturday．

4.--_____Icomein?

--Yes，please．

5.____youtellmewherethestationis?

6.Youdon't____worryabouther．Sheismuchbetternow．

7Ifyouwanttopasstheexam，you____workharder.

8A:

______Ifinishmyhomeworknow?

No,you______.You______doittomorrow.

9.A:

Thispencilisveryshort,______youstilluseit?

No,I______.You______buyoneforme.

10A:

______Igooutandplaybasketball,mum?

No,you______finishyourhomeworkfirst.

11.A:

______Iplayfootballinthestreet?

No,you______.

12A:

______youfindmanypeopleinthedoctor’swaitingroom.B:

No,I______.

Fillintheblankswith"need（to）"intheirproperforms：

1._______Icometomorrow?

明天我需要来吗（need）？

—Yes,you________/__________.

—No,you_______/__________.

2.He___________worryabouthisson.（neednot）他不必为他的儿子担心。

3.He________somehelp.（need）他需要一些帮助。

4.They_________（notneed）help.他们不需要帮助.

5.Julia__________（need）_______（look）aftertheoldman.（need）Julia需要照料这位老人。

6.I__________（notneed）_______（get）upearlythismorning.今天早上我不必早起.

7.Youneedtocrosstheriverbyyourself,______you?

8.Shedidn'tneedtogiveyouthebook,_______she?

ExerciseB

______1.--Let’sgotoTaishanParkbytaxi.–It’snotfar.We______takeataxi.

A.needn’tB.can’tC.mustn’tD.couldn’t

______2.You______playwithfire,Tom.It’sverydangerousA.needn’tB.maynotC.mustn’tD.wouldn’t

______3.Asweknow,fish______dieoutofwater.A.mayB.isgoingtoC.canD.will

______4.Canyouanswermyquestion,Lily?

–Yes,I______.A.mayB.needC.mustD.can

______5.Excuseme,______youtellmethewaytothenearestbusstation?

--Sorry,Ican’t.I’mastrangerhere.

A.canB.needC.mustD.may

______6.--______Ihavetoshowtheschoolreporttomyparents,MissKing?

--Yes,youdo.

A.MustB.DoC.CanD.May

______7.--______weswiminthatriver?

–No,you______.It’sdangeroustoswimthere.

A.Must,can’tB.Can,maynotC.Shall,don’tD.May,mustn’t

______8.Aftersuchalongjourney,thechildren______beverytirednow.A.canB.mustC.havetoD.need

______9.You’vemadethesamemistakesagain.You______bemorecarefulnexttime.

A.canB.mayC.hadtoD.should

______10.--______Ifillinthecheck-informrightnow,sir?

--No,youneedn’t.Youcancompleteitthisafternoon.

A.MayB.CanC.WouldD.Must

______11.–MustIfinishreadingthebooktoday?

--No.You______ifyouhavesomethingelsetodo.

A.mustn’tB.couldn’tC.can’tD.don’thaveto

______12.Youlooktirednow.You______stayathomeandhavearest.

A.hadtoB.hadbetterC.wouldliketoD.needn't

______13.CouldIlookatyourpictures?

–Yes,ofcourseyou______.

A.couldB.canC.willD.might

_______14.Lookatthosebigblackclouds.It______rain.Let’shurry.

A.mustB.willC.wouldD.isgoingto

_______15.–Wouldyouliketogoswimmingwithmethisafternoon?

--I’dloveto.ButI’mafraidI______.Ihavetoomuchworktodo.

A.can’tB.mustn’tC.needn’tD.maynot

_______16.--______youliketogoshoppingwithme?

–Yes,I______.

A.Would,wouldB.Will,willlikeC.Would,wouldloveD.Would,wouldloveto

_______17.–MustIstayathome,Mum?

-No,you______.A.needn'tB.mustn'tC.don'tD.maynot

_______18–Canyougoswimmingwithusthisafternoon?

--Sorry,Ican’t.I_____takecareofmylittlesisterathomebecausemymotherisill.

A.canB.mayC.wouldDhaveto

_______19.–MayIstophere?

--No,you______.A.mustn'tB.mightnotC.needn'tD.won’t

_______20.______Iknowyourname?

A.MayB.WillC.ShallD.Must

ExerciseC

1、Choosethebestanswer:

（）1、—________youpassmeapen?

I’dliketowritedownthephonenumber.—Sure.Hereitis.

A.CanB.NeedC.MightD.Must

（）2.—MayIgotothecinema,mum?

—Certainly,butyou________bebackby11o’clock.

A.canB.mayC.mustD.need

（）3.You______gettherebybus.

A.don'tneedB.needn'ttoC.don'tneedtoD.needdon'tto

（）4.You_______worryaboutme.It’snothingserious.A.can’tB.mustn’tC.needn’tD.won’t

（）5.Themanintheoffice___beMr.Black,becausehewenthomejustnow.

A.mustn'tB.maynotC.can'tD.needn't

（）6.John___cometoseeustonight,butheisn'tverysureyet.A.mayB.canC.hastoD.Must

（）7-MayItakethisbookout?

-No,you___.A.can'tB.maynotC.needn'tD.aren't

（）8You___goandseeadoctoratoncebecauseyou'regotafever.A.canB.mustC.needn'tD.would

（）9-CanyouspeakJapanese?

-No,I____.A.mustn'tB.can'tC.needn'tD.maynot

（）10.-He___beintheclassroom,Ithink.-No,he___beintheclassroom.Isawhimgohomeaminuteago.

A.can;maynotB.must;maynotC.may;can'tD.may;mustn't

（）11.-ShallIgetonemorecakeforyo

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