高中英语必修三unit2-课件

SomethingthatyousayisnottrueNottobepunishedforsomethingUncookedThestrongwishtoknowaboutsomethingSomeonewhobuysthingsorservicesfromashop,company,etcAparticularqualitythatgivessomeoneorsomethinganadvantageliegetawayitrawcuriositycustomerbenefitAnswerkeyforexercise1onpage12DiscoveringusefulwordsandexpressionsJuliewantedtobecomethinner.Sheknewshe________eatmorevegetablesandfruitbutlittlemeat.However,asshewassoafraidofbeinglaughedatbyherfriends,shedidnotconsultadoctorbutlivedona_____ofrice,_____vegetables,bananasandlemons.Threeweekslater,shefoundsheweighedasmuchasever.balanceddietrawslimoughttoenergeticloseweightloseheartloseinterestlosefaceoughttodietrawAnswerkeyforexercise2onpage12Shefeltsosadandhopelessaboutherselfandherbehaviourchanged.Shedidn’tdaretofaceherboyfriendandshewasunwillingtovisitherfriendsanymore.Luckily,herbestfriendFredcametoseeherandencouragedhertoexercise,eata_________dietandenjoylifeagain.SoonJuliebecameamazingly_________and_____!Shefeltveryhappy.balancedenergeticslimbecomethinnerloseweightBeinglaughedatbyherfriends

losingfacefeltsosadandhopelessaboutyourself

lostheartWasunwillingtovisitanymore

lostinterestinvisiting1√pear;×cream(fatandalltheothersarefruit)2√sugar;×mutton(meatandalltheothersareenergy–givingfood)3√bacon;×cabbage(vegetableandalltheothersaremeat)

4√strawberry;×eggplant(vegetableandalltheothersarefruit)Answerkeyforexercise3onpage12ModalVerbIIUnit2Ithinkshe_______apologisetothepublic.You________goandseethedoctor.

我认为她应该向公众道歉。你应当去找医生看看病。oughttooughttoFillintheblanksaccordingtotheChinese.Titanic______beagoodmovie.Weknowifwekeepatitwe_______succeed.

泰坦尼克号应该是部好电影。我们知道如果我们坚持下去就应该会成功。shouldshouldWe______putonwarmclothesinwinter.

冬天的时候，我们不得不穿上温暖的衣服。你必须把面粉和黄油和在一起。You_______mixtheflourandthebutter.

havetohavetoInEnglandtraffic_____keeptotheleft.

在英国，车辆必须靠左行驶。Allpassengers______wearseatbelts.所有乘客都必须系安全带。mustmust上面的空你都填对了吗？如此多的情态动词，我们应当如何使用呢？接下来就进行详细的讲解。should和oughtto都为“应该”的意思，可用于各种人称。oughtto的语气稍重一些。Yououghtto(should)followyourteacher’sadvice.oughtto／should

表示主语的义务或责任：

Youshouldtakecareofyoursister.

你应当去照顾你妹妹。

或指出一个正确、明智的动作：

Theyshouldn'tallowparkinghere；thestreetistoonarrow．这儿不该允许停车；马路太窄了。should和oughtto后面跟动词不定式的完成式,其肯定句表示”过去应该做而未做”,其否定句则表示”过去不该做但做了”。Youshould/oughttohavemadethedecisionaweekago.Ishouldn'thavemadesuchafoolishmistake.注意

must的用法

1.表示主观的义务和必要,

主要用于肯定句和疑问句,

意思为

“必须……，得……，要……”；由must引起的疑问句，肯定回答要用must或have

to,

否定回答要用needn’t或don’t

have

to,

意思是“不必”；

must的否定形式mustn’t表示must/haveto禁止，意思是“不能,不许”。如：

—Must

I

finish

the

task

right

now?

我现在必须完成这个工作吗？—Yes,you

must.

/

Yes,

you

have

to.

是的。

(—No,youneedn’t./No,youdon’thaveto.不,不必。)

have

to

的用法

1.must表示一种主观的需要，而have

to

表示一种客观的需要，意思是“不得不”。

如：

Ihavetoattendanimportantmeetingthisafternoon.

今天下午我不得不参加一个重要的会议。

Motherisout,soIhavetolookaftertheshop.

妈妈不在家，因此我不得不照看商店。

2.have

to

的否定形式是don’thaveto,

相当于needn’t。如：

Theydon’thavetobuyacomputeratpresent.

他们目前没有必要买电脑。

情态动词(+动词原形)行为动词

.needdare

1.无人称和数的变化;2.尤其用于：*否定句及疑问句中;*在if/whether之后;*或与hardly,never,noone,nobody连用;

3.常以needn’t

和daren’t

的形式出现;4.dare有其过去时dared.多用于肯定句;(sb.)needtododaretodoneedtobedoneneeddoing

need/dare注意对need问句的回答:--NeedIfinishtheworktoday?--Yes,________________.No,________________.No,________________.youmustyouneedn’tyoudon’thavetoneedn’t对其它情态动词的回答:--ShallItellJohnaboutit?--No,you_____________________.--Mustwedoitnow?--No,you_____________________.needn’t(don’thaveto)needn’t(don’thaveto)dare可用实意动词和情态动词，用作情态动词时，意思是“敢”，其后接动词原形，通常只用于否定句或疑问句以及if或whether之后，一般不用于肯定句。如：Dareyoutellherthetruth？你敢告诉她事实真相吗？Idon’tknowwhetherhedaretry.我不知他是否敢试一试。Idaren’taskherforarise.我不敢要求她加薪。dare用作实意动词时意为“敢于”，可以有各种词形变化，可用于各类句型（肯定句、否定句、疑问句及各类从句等），其后多接带to的不定式，有时to也可省去（尤其是在否定句或疑问句），可用于非谓语形式，完成时态等。如：Wemustdaretothink,speakandact.我们必须敢想、敢说、敢做。Iwonderhowhedares(to)saysuchthings.我纳闷他怎么竟敢说出这样的话来。情态动词dare可以有过去式dared，但也可以直接用dare表示过去式，或后接动词完成式。如：Thatwaswhyhedareddoso.那就是他为什么敢这样做的原因。Motherdare(d)nottellfathershe‘dgivenawayhisoldjacket.母亲不敢告诉父亲她把他的旧上衣送人了。dare的过去式问题dare后通常不接动词的进行式。Nobodyneedtobeafraidofcatchingthedisease.Nobodyneedbeafraidofcatchingthedisease.Thesedishesneedbecleanedcarefully.Thesedishesneedtobecleanedcarefully.Thesedishesneedcleaningcarefully.判断正误:

Howdareyousaysuchathing?Howdareyoutosaysuchathing?Hedaren’ttospeakEnglishbeforesuchacrowd,didhe?Hedaren’tspeakEnglishbeforesuchacrowd,darehe?表示推测——情态动词的重要用法情态动词对将来对现在对过去肯定的推测可能的推测+V.常见mustbe+V./+bedoing+havedone+V.mustmay/might+V./+bedoing+have+done可以用not表示“可能不”情态动词对将来对现在对过去否定的推测疑问的推测can’t/couldn’tcan/could

+V./+bedoing+V.+havedone+V.+V./+bedoing+havedone在不表示推测的情态动词中,我们要注意以下方面的问题:1.表示能力、许可的情态动词的用法。2.表示否定的情态动词的用法。3.shall和will的多种意义的区别。4.情态动词短语的使用。5.虚拟语气中情态动词的使用。表示能力:

can,could,beabletobeableto

能用于各种时态。can/could

只能表示现在或过去的能力。was/wereableto

设法做成某事相当于

managedtodosth.succeededindoingsth.1.表示能力、许可的情态动词的用法。表示许可:

may/might,can/could

might,could

比较委婉,一般多用于疑问句。can,may

表达的语言比较随便。在以could,might

表示征询对方意见或表示请求时，回答应相应使用can,may。2.表示否定的情态动词的用法:mustn’t不准;禁止needn’t没必要(=don’thaveto)can’t不能;不可能maynot不可以;可能不shouldn’t不应该(=oughtnotto)部分情态动词的否定式是情态动词中的考点之一。不同的“肯定”程度可按下列层次排列：

Heisathome.(事实)Hemustbeathome.（非常肯定的推断）

Hecouldbeathome.（很可能）

Heoughttobeathome.（很可能）

Hemaybeathome.（仅仅可能而已）

Hemightbeathome.（或许,非常不确定）Hecouldn’tbeathome.（很可能不在家）

Hecan’tbeathome.（一定不在家）Heisn'tathome.（事实）

3.情态动词shall,will的多种意义:shall/will+动词原形:

shall可表示必须、命令、警告或征询意见。will可表示意愿、常出现的动作、在疑问句中表示请求和建议。均可表示将来。过去时为

should,would。4.情态动词短语的使用:wouldliketodo…wouldratherdo…wouldrather+从句wouldprefertodo...hadbetterdo...5.用于虚拟语气的情态动词:shouldmightcouldwouldneedn’toughttoPractice1:高考考题专练1.Ithoughtyou_____likesomethingtoread,soIhavebroughtyousomebooks.A.mayB.mightC.wouldD.must2.Whereismypen?I____it.A.mightloseB.wouldhavelostC.shouldhavelostD.musthavelost3.Ididn’thearthephone.I___asleepA.mustbeB.musthavebeenC.shouldbeD.shouldhavebeenBD

B4.Therewerealreadyfivepeopleinthecar,buttheymanagedtotakemeaswell.It____acomfortablejourneyA.can’tbeB.shouldn’tbeC.mustn’thavebeenD.couldn’thavebeen5.It’snearlyseveno’clock.Jack___behereatanymoment.A.mustB.needC.shouldD.could

DC6.Didthetrainarriveintime?No.It_______twohoursago.A.musthavearrivedB.oughttohavearrivedC.mustarriveD.oughttoarrive7."MustIdrivetohishouseandpickupthechildren?"

"No,

."

A.youshouldn't

B.youmightnot

C.youneedn't

D.youmustn'tBC8.Wedidn'tseeTomatthemeetingyesterday.He

it.

A.mustn'thaveattended

B.cannothaveattended

C.needn'thaveattended

D.wouldhavenotattendedB9.Thereissomeoneknockingatthedoor.

itbeTom?

A.can

B.must

C.should

D.oughttoA10.Twoyearsago,myhusbandboughtmeabicycle.Ifyouliveintown,itisoftenfasterthanacarandyou

worryaboutparking.

A.mustnot

B.maynot

C.shouldnot

D.don'thavetoD

11.You_____suchalongcomposition.Theteacheronlyaskedfor300words.Youhavewritten600.A.mustn’thavewrittenB.couldn’thavewrittenC.needn’thavewrittenD.donothavetowriteC1.我不得不接受你的建议。2.未经允许，你不能来这儿。

3.你应当去照顾你妹妹。4.他们想必已到那儿了。

Youmustn’tcomeherewithoutpermission.Youshouldtakecareofyoursister.Theyoughttobetherebynow.翻译

Ihavetoacceptyoursuggestion.Answerkeyforexercise1onpage13Thenusuallybylunchtimetheywouldallbesold.

(possibility)Whatcouldhavehappened?(possibility)Nothingcouldbebetter…”(possibility)somethingterriblemusthavehappenedif….(Guessing)Hecouldnotbelievehiseyes.

(Abilitys)Discoveringusefulstructures

Perhapsheshouldgotothelibraryandfindout.(Duty)HecouldnothaveYongHuigettingawaywithtellingpeoplelies!(Intention)Hehadbetterdosomeresearch!(Duty)EventhoughhercustomersmightgetthinaftereatingYongHui’sfo