Discoveringusefulstructures---ModalVerbs(II)Unit2HealthyeatingDiscoveringusefulstructuresUReadthetextandfindoutthesentencescontainingmodalverbs1.Thenusuallybylunchtimetheywouldallbesold.2.Bynowhisrestaurantoughttobefullofpeople.

3.Whatcouldhavehappened?4.Nothingcouldbebetter…5.SomethingterriblemusthavehappenedifLiChangwasnotcomingtoeatinhisrestaurantashealwaysdid.Readthetextandfindoutthe6.Hecouldnotbelievehiseyes.7.Perhapsheshouldgotothelibraryandfindout.8.HecouldnothaveYongHuigettingawaywithtellingpeoplelies!9.EventhoughhercustomersmightgetthinaftereatingYongHui’sfood…10.Theywouldbecometiredveryquickly.11.…h(huán)ecouldwinhiscustomersback.6.HecouldnotbelievehiseyModalVerbs(II)ought(oughtn’t)to/should(should’t)haveto/mustneed/darecan/can’tModalVerbs(II)ought(oughtn’t“應(yīng)該，要”，無人稱時態(tài)和數(shù)的變化

He

ought

to

come

tomorrow.

否定式oughtnotto（oughtn’tto）疑問式Oughtsbto…?Heoughtnottobesocareless.Oughthetoseethedoctor?表推測，按理應(yīng)該，非常可能Ifhestartedyesterday,heoughttobeinShanghainow.如果他昨天出發(fā)的話，現(xiàn)在應(yīng)該在上海了。oughtto“應(yīng)該，要”，無人稱時態(tài)和數(shù)的變化oughttoought(oughtn’t)to&should(shouldn’t)

表責(zé)任或者勸告“應(yīng)該”，后者語氣較強ThereissomethingIoughttotellyoubeforeyouleave.在你們離開之前我有事要告訴你們。Youshouldhavearestaftersports.運動之后你應(yīng)該休息一下。hadbetter口語中常用，表示最好（做或不做某事）Youhadbetterstayhere.你最好呆在這里。ought(oughtn’t)to&should(s“不得不”有人稱、時態(tài)的變化

Tomhastoattendanimportantmeetingthisafternoon.今天下午湯姆不得不參加一個重要的會議。have(got)to“不得不”有人稱、時態(tài)的變化

have(got)toMusttheydo…?Yes,theymust.No,theyneedn’t/don’thaveto.

musthaveto主觀／客觀主觀客觀時態(tài)

現(xiàn)在，將來多種表推測√

×詢問意愿√

×否定意義mustn’t禁止，不允許don’thaveto不必(相當(dāng)needn’t)Musttheydo…?musthaveto主觀need“需要”和dare“敢”既可用作情態(tài)動詞，也可用作實義動詞。作情態(tài)動詞主要用于否定句和疑問句。

You

needn’t

telephone

him

now.

She

dare

not

go

out

alone

at

night.

作實義動詞時，可用于各種句式。

You

don’t

need

to

do

it

yourself.

We

need

to

tell

them

the

news.

Hedidnotdare(to)lookup.Idaresay…為固定習(xí)語“我想，很可能，大概”

Idaresayhe’llcomeagain.

大概他將會再來。dare&needneed“需要”和dare“敢”既可用作情態(tài)動詞，也可用注意對need問句的回答:--NeedIfinishtheworktoday?--Yes,________________.No,________________.No,________________.youmustyouneedn’tyoudon’thavetoneedn’t對其它情態(tài)動詞的回答:--ShallItellJohnaboutit?--No,you__________.--No,you__________.

--Mustwedoitnow?--No,you__________.--No,you__________.needn’tdon’thavetoneedn’tdon’thaveto注意對need問句的回答:youmustyouneedncan&can’t(could&couldn’t)1.表示能力2.表示可能Hecan(not)swimacrossthatriver.表可能時,can常用于疑問句或否定句中---Canthenewsbetrue?---No,itcan’t.表能力can&can’t(could&couldn’t)“must+have+done”表示對過去事情的肯定推測，譯成“一定做過某事”，該結(jié)構(gòu)只用于肯定句。Youmusthavebeenmadtospeaktotheservant.你和仆人說話，一定是發(fā)瘋了。Ididn’thearthephone,Imusthavebeenasleep.

我沒聽到電話，我一定是睡著了?！扒閼B(tài)動詞+havedone”的用法“must+have+done”“情態(tài)動詞+havedoncan

/

could

not+

have

done對過去行為的懷疑或不肯定,

表示否定推測?！安豢赡堋盡r.Smithcan’thavegonetoBeijing,forIsawhiminthelibraryjustnow.史密斯先生不可能去北京了，我剛才還在圖書館見過他。He

can’t

have

been

to

America.

他不可能去過美國。

could

+

have

done表示“本來可以做而實際上沒做某事”；You

could

have

done

better,

but

you

didn’t

try

your

best.

你本來可以做得更好，但你沒努力。Hecouldhavepassedtheexam,buthewastoocareless.本來他能夠通過考試，但是他太粗心。can

/

could

not+

have

done對過去行might/mayhavedone表示對過去發(fā)生的動作進(jìn)行的可能性推測?！翱赡芤呀?jīng)”“也許已經(jīng)”，

Hemayhavegonetothehospital.

他可能去醫(yī)院了。might的可能性更小。Hemighthavegivenyoumorehelp,eventhoughhewasbusy.他或許會多給你一些幫助，即使他很忙。

Hemighthavereadaboutthenewsinthenewspaper.

他可能已經(jīng)從報紙上知道這個消息了。might/mayhavedone表示對過去發(fā)生的動

ought

to

/shouldhave

done

本應(yīng)該做而實際未做，有責(zé)備批評的意味。意為“本應(yīng)該…但…”

Youshouldhavetoldherthetruthearlier.你應(yīng)該早點告訴她真相。

Sheshouldn’thaveleftwithoutsayingaword.她本不應(yīng)該一言不發(fā)地離開。You

oughtnot

to

have

told

him

about

the

news.

你不應(yīng)該告訴他這個消息。ought

notto

/shouldnothave

done本不應(yīng)該做而實際做了ought

to

/shouldhave

done

needhavedone本需要做某事而實際未做needn’thavedone本不需要做某事而實際上做了TomneedhavecleanedtheclassroominsteadofLilythismorrow.今天早上湯姆本需要代替莉莉打掃教室的。

Therewasplentyoftime.Ineedn’thavehurried.(ButIhurried.)時間很多，我本不需要著急的。Youneedn’thavestayedhere.你本不需要留在這。needhavedone本需要做某事而實際未做1.You____allthoseclothes!Wehaveawashingmachinetodothatsortofthing.

A.needn'thavewashedB.shouldn'thavewashed

C.mustnothavewashedD.cannothavewashed

A1.You____allthoseclothes!2.John'sscoreonthetestisthehighestintheclass;he____lastnight.

A.shouldstudyB.shouldhavestudied

C.musthavestudiedmusthavetostudy

C2.John'sscoreonthetestis3.Theroomisinaterriblemess;it____cleaned.

A.can'thavebeenB.shouldn'thavebeen

C.mustn'thavebeenD.wouldn'thavebeenA3.TheroomisinaterriblemAshehadheartattack,hewastoldthathe____continuethework.

A.needn'tB.maynotC.mustn'tD.can't5.Twoeyes____seemorethanone.

A.canB.mayC.willD.should

CAAshehadheartattack,hewas6.You____totowntoseethefilmyesterday.ItwillbeonTVtonight.

A.needn'tgo