河北省邢臺(tái)市育才中學(xué)人教版高中英語(yǔ)必修三Unit1FestivalsaroundtheworldGrammar（共24張）課件

Unit1FestivalsaroundtheworldDiscoveringusefulstructures

---ModalVerbs

(I)情態(tài)動(dòng)詞的語(yǔ)法特征情態(tài)動(dòng)詞有一定的意義，表示或暗示某種情緒或態(tài)度，表示可能、建議、愿望、必要、允許、能力等。2.情態(tài)動(dòng)詞沒(méi)有人稱和數(shù)的變化，即不隨主語(yǔ)的不同而變化。3.情態(tài)動(dòng)詞不能獨(dú)立使用，必須和實(shí)義動(dòng)詞一起構(gòu)成謂語(yǔ)。4.情態(tài)動(dòng)詞除ought和have外，后面只能接不帶to的不定式。5.

情態(tài)動(dòng)詞沒(méi)有非謂語(yǔ)形式，即沒(méi)有不定式、分詞等形式。

must表示必須，多處于義務(wù)、責(zé)任或強(qiáng)制命令(must提問(wèn)，否定回答用needn’t或don’thaveto).Youmusthandinyourhomeworktoday.(2)mustn’t表示禁止。意思是“不許”、“不準(zhǔn)”、“不可以”。

Youmustn’tsmokehere.(3)用于發(fā)生了某種于說(shuō)話人的愿望相反、不受歡迎的事時(shí)，意思是“偏偏”、“偏要”。Whymusthedoitthatway?WhymustitrainonSunday?(4)表示推測(cè)，只能用于肯定句。Hemustbereadingnovelsnow.Theroadiswet.Itmusthaverainedlastnight.can/could(1)表示能力CanyouspeakJapanese?(2)表示推測(cè)時(shí)，只用在否定句或疑問(wèn)句中。Hecan’tbeathomenow.(3)表示允許(許可或請(qǐng)求許可）Youcangonow,buthecan’t.(4)表驚異、懷疑等Howcanyoubesorude?could可表示能力或可能性，多用于過(guò)去，也可指現(xiàn)在，通常表示虛擬或作為can的委婉形式。can

/

could

+

have

done在肯定句中表示“本來(lái)可以做而實(shí)際上沒(méi)做某事”；在疑問(wèn)句或否定句中表示對(duì)過(guò)去行為的懷疑或不肯定,

表示推測(cè)。You

could

have

done

better,

but

you

didn’t

try

your

best.

你本來(lái)可以做得更好，但你沒(méi)努力。

He

can’t

have

been

to

that

town.

他不可能去過(guò)那個(gè)城。may/might(1)表示可能性，might比may可能性更小。Itmaybetrue.Hemightnotcometoday.(2)表示請(qǐng)求、許可，多用于肯定和疑問(wèn)句中MayIaskyouaquestion?(3)表示愿望Mayyoubehappyallyourlife.might比may語(yǔ)氣更委婉may/might表示推測(cè)時(shí)，表示對(duì)現(xiàn)在或?qū)?lái)要發(fā)生的事情把握不大。might/mayhavedone表示對(duì)過(guò)去發(fā)生的動(dòng)作進(jìn)行的可能性推測(cè)。Hemayhavegonetotheclinic.他可能去醫(yī)務(wù)室了。Hemighthavereadaboutthenewsinthenewspaper.他可能已經(jīng)從報(bào)紙上知道這個(gè)消息了。will/would表示意愿，will表示現(xiàn)在的意愿，would表示過(guò)去的意愿。Gowhereyouwill.SheaskedifIwouldgowiththem.2.表示征求意見(jiàn)或提出請(qǐng)求，主要用于第二人稱的疑問(wèn)句中，will和would均可用，would此時(shí)并不表過(guò)去，而表示委婉語(yǔ)氣。

WouldSundaynightsuityou?Will/Wouldyoupleaseposttheletterforme?

3.表示習(xí)慣和傾向性will表示現(xiàn)在的習(xí)慣，would表示過(guò)去的習(xí)慣(=usedtodo)。Oilwillfloatonwater.Whenhewasachild,hewouldoftengoskiing.

4.表示推測(cè)

will用于談?wù)摤F(xiàn)在，would可用于談?wù)撨^(guò)去，也可用于談?wù)摤F(xiàn)在(語(yǔ)氣較委婉)。

Askhim.Hewillknow.

Everyfamilywouldhavesomesortoftrouble.

Ithoughtyouwouldhavefinisheditbynow.

shall/should1.在陳述句中,shall用于二、三人稱表示允諾、警告、命令、決心等。YoushalldoasIsay.(命令)Nothingshall

stopmedoingit.(決心)Tellhimthatheshallhavethebooktomorrow.(允諾)2.shall在疑問(wèn)句中,用于一、三人稱，用來(lái)表示請(qǐng)求或征求意見(jiàn)。ShallIopenthewindowforyou？（征求意見(jiàn)）Shallhefetchsomewaterforyou？（請(qǐng)求）3.

should常表示應(yīng)當(dāng)，意思和oughtto相近，但語(yǔ)氣較弱。Youngpeopleshouldlearnhowtousecomputers.5.shouldhavedone表示責(zé)備或批評(píng),意為“本應(yīng)該…但”Youshouldhavetoldherthetruthearlier.Sheshouldn’thaveleftwithoutsayingaword.4.should用于可能性推測(cè)時(shí),表“應(yīng)該，很可能”Theyleftat5:30.They

should

gettherenow.1.Jackdescribedhisfather,who____abraveboymanyyearsago,asastrong–willedman.（2010安徽卷）A.wouldbeB.wouldhavebeenC.mustbe D.musthavebeen答案：D解析：句意為“杰克把他的父親描述為一個(gè)意志堅(jiān)強(qiáng)的人，他的父親多年前肯定很勇敢”用musthavebeen表示對(duì)過(guò)去事情的肯定推測(cè)。高考真題2.You_____buyagift,butyoucanifyouwantto.（2010湖南卷）A.must B.mustn't C.haveto D.don'thaveto答案：D解析：don’thaveto意為“沒(méi)有必要”，符合語(yǔ)境，句意為：“你沒(méi)有必要買禮物，但如果你想買的話，你也可以買?！?.Ihavetoldyouthetruth.______Ikeeprepeatingit?（2010江西卷）A.MustB.CanC.MayD.Will答案：A解析：must必須,一定can可以,能夠，may也許，will意愿,傾向性動(dòng)作。前半句說(shuō)我告訴你事實(shí)了,這里用的是現(xiàn)在完成時(shí),表示過(guò)去的動(dòng)作對(duì)現(xiàn)在造成了影響,既然我已經(jīng)說(shuō)了,我還必須重復(fù)一遍嗎？4.I_______havewatchedthatmovie—it’llgivemehorribledreams.（2010山東卷）A.shouldn’tB.needn’tC.couldn’tD.mustn’t答案：A解析：句意應(yīng)為“我本來(lái)不應(yīng)該看那部電影的----它會(huì)使我做噩夢(mèng)的。”表示“本來(lái)不應(yīng)該做而做了某事”用shouldn’thavedone,所以A項(xiàng)正確。Ashehadheartattack,hewastoldthathe____continuethework.

A.needn'tB.maynotC.mustn'tD.can't2.AnEnglishmanwho____notspeakItalianwasoncetravelinginItaly.A.mustB.couldC.mayD.might3.I____liketomakeasuggestion.A.couldB.wouldC.mustD.might4.Iknowthingsarehardwithyou,butyou____trytogetoverthedifficulties.

A.canB.mayC.mustD.oughtC

C

B

B

Choosethebestanswers.5.Wehopethatasmanypeopleaspossible_____joinusforthepicnictomorrow.

A.mayB.must

C.shouldD.can

6.—IthinkI’llgiveBobaring.

—You_____.Youhaven’tbeenintouchwithhimforages.

A.willB.may

C.wouldD.should

7.—CouldIhaveawordwithyou,Mum?

—Ohdear,ifyou______.

A.canB.must

C.mayD.shouldDDB

8.ItisusuallywarminmyhometowninMarch,butit_____berathercoldsometimes.A.mustB.canC.shouldD.would9.Youdon’thavetoknowthenameoftheauthortofindabook.You_____findthebookbythetitle.A.mustB.needC.canD.would10.Althoughthis____soundlikeasimpletask,greatcareisneeded.A.mustB.mayC.shallD.shouldB

C

B

11.You______behungryalready—youhadlunchonlytwohoursago!A.wouldn’tB.can’tC.mustn’tD.needn’t12.Accordingtotheairtrafficrules,you___switchoffyourmobilephonebeforeboarding.A.mayB.canC.wouldD.should13.She______haveleftschool,forherbikeisstillhere.A.can’tB.wouldn’tC.shouldn’tD.mustn’tB

D

A

Completethefollowingsentencesusingmodalverbs.You’vebeenworkingallday.You______beverytired.2.Iwonderwhothatis.It_____beLisa.She’sinthelibraryatthistime.3.Itisalongti