Unit 5 The Value of Money Discovering Useful Structures 课件- 高一下学期英语人教版（2019）必修第三册

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Unit5TheValueofMoneyDiscoveringUsefulStructures

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Leading-inMayweaskwhatyou'redoinginthiscountryandwhatyourplansare?Ican'tsaythatIhaveanyplans.Youmustn'tworryaboutthat.Couldyouoffermeworkhere?Readthesentencesbelowandthinkabout:Whatarethefunctionsandmeaningsofthesemodalverbs?Modalverbshavemanyfunctions,includingthefollowing(A-F).PresentationA.necessityB.possibilityC.obligationD.requestE.adviceF.intentionFindmodalverbsinprevioussectionsanddiscusstheirfunctions.

Readthepassageandfillintheblankswithsuitablemodalverbsinthebox.maymustcanoughttomighthadbetterwouldshouldInthefilmTheMillionPoundBankNote,HenryAdamsisstuckinaforeigncountrywithoutmoneyandfriends,andwithnowheretostay.Whilethissituation_____seemunusual,itcansometimeshappentotravellers.Incaseithappenstoyouonatripabroad,what________youdo?First,andmostimportantly,you________staycalm.Fear_____causeyoutobecomeconfused.YouneedtothinkmayshouldmustcanReadthepassageandfillintheblankswithsuitablemodalverbsinthebox.maymustcanoughttomighthadbetterwouldshouldclearly.Second,youshouldgotoyournearestconsulate.They________beabletohelptosomeextent.Third,you______dowelltocheckwithsomelocalcharities.They______offerhelptotravellersinneed.Fourth,you_________avoidgettingintotrouble.You______thinkthatstealingsomemoneyorfoodwouldhelpyou,butyoushouldnotdoso.Gettingcaught______ruinyourlife.oughttowouldmighthadbettermightwouldI.ReviewofmodalverbsGrammar一、情态动词的语法特征情态动词可以表示可能、建议、愿望、必要、允许、能力等。2.情态动词没有人称和数的变化。3.情态动词必须和实义动词一起构成谓语。4.情态动词除ought和have外，后面只能接不带to的不定式。5.情态动词没有非谓语形式，即没有不定式、分词等形式。1.只作情态动词的：2.可情态可实义的：

3.可情态可助动词的:

4.相当于情态动词的:

二、情态动词的分类can/could,may/might,oughtto,mustneed,dare/daredshall/should,will/wouldhaveto,usedto2.must

表示必须、必要。回答must引出的问句时,

如果是否定的回答,不能用mustn’t，而要用

needn’t或don’thaveto。三、情态动词的用法must,haveto—Mustwehandinourexercisebookstoday?—Yes,youmust.(No,youdon’thaveto.)1.must表示推测时，只能用于肯定句。Theremustbesomethingwrongwiththecomputer.Youhaveworkedhardallday.Youmustbetired.3.haveto和must均表示“______”，但______是指说话人的主观看法，而________则强调客观需要。。①IhavetowaitherebecauseIhavenoumbrellawithme.②Imustrecitethetextthismorning.can/could1.

can/could表推测,只能用在否定句或疑问句中。It’ssolate.CanTombereading?She

couldn’t

betellinglies.*对过去发生的行为进行推测时，常用can/couldhavedone的否定或疑问形式。Thedoorwaslocked.Shecouldn’thavebeenathome.必须musthaveto2.

can/could表能力，can表示现在的能力，could表示过去的能力。Icanreadthischinesearticle.She

couldplaythepianoattheageoffive.*can表示能力时，还可以用beableto代替。

beableto后接动词原形，可用于大多数时态。IwillbeabletospeakFrenchinanotherfewmonths.Theywereabletoescapefromthebuilding.3.

can/could表许可，could语气更委婉。CanIcomein?CouldIborrowyourpen?may/might1.表示推测时,只能用于陈述句,可以指现在，也可以指过去，且可能性不大。Theymaycomeheretomorrow.Hemightbedoinghishomeworknow.2.表示请求或允许,might可以指过去的时间，也可指现在的时间。对may的一般疑问句的肯定回答可用may或can,但作否定回答时要用mustn't或can't。—May(Might)Ihavealittlebrandy?—No,youmustn't.You'dbetternot.3.May可以表示祝愿或希望，而might不行。Maytheybeveryhappyinthefuture.Mayyousucceedinthecomingyear.shall/should1.在一、三人称的疑问句中,shall用来询问对方的意愿。Shallwebeginourlesson?2.用于二、三人称的陈述句中,表说话人命令、警告、允诺等口吻。HeshallhavethebookwhenIfinishreading.Youshouldbepolitetoyourteachers.will/would1.表示请求、建议等,would比will委婉客气。Wouldyoupassmethebook?2.表示意志、愿望和决心。Iwillneverdothatagain.Theyaskedifwewoulddothatagain.3.should表示劝告、建议、命令，用于各种人称。4.should表示说话人的惊讶、愤怒、失望等特殊情感，意为“居然，竟然”。Amazing!Youshouldwearslippersatwork.oughtto1.表示职责和义务，意为“应该”(因责任、义务等该做)，口气比should稍重。Yououghtn'ttosmokesomuch.2.表示推测，暗含很大的可能性，近似于should。HanMeioughttoknowhistelephonenumber.dare/need1.作情态动词时，主要用于否定句、疑问句和条件从句中，一般不用在肯定句中。Hedoesn'tdare(to)answer.Youdidn'tneedtodoityourself.HowdareyousayI’munfair?Youneedn’tcomesoearly.2.dare和need作实义动词时，其否定和疑问的构成需借助do/did/does，need后面接带to的不定式，而在疑问句和否定句中，dare后可省去to。有时态、人称和数的变化。II.Thepastfuturetense过去将来时Grammar一、定义过去将来时，表示从过去某一时间来看，将要发生的动作或存在的状态。二、结构1.would+动词原形HeaskedmehowsoonIwouldgetready.IaskedhimifPeterwouldarrivethenextday.Shetoldmeshewouldmakedowithitlater.2.was/weregoingto+动词原形Shetoldmeshewasgoingtoposttheparcel.Hewasgoingtostartoffatonce.*与would+动词原形相比，was/weregoingto+动词原形有打算、计划的含义。3.was/wereabouttodo表示说话的瞬间将要发生的动作。此结构一般不与时间状语连用，但后面可以接when引导的分句。Ifeltthatsomethingterriblewasabouttohappen.Wewereabouttogotherewhenitbegintorain.4.go,come,leave,start,meet等动词的过去进行时，表示就过去的某一时刻而言即将发生的动作。Shedidn'tsaywhenshewascomingagainnexttime.JimdecidedtheywereflyingtoEnglandnextmonth.5.was/weretodo表示曾经计划做某事，并且从现在看已经实现。当表示“原计划做某事但是最终未发生”，用was/weretohavedone.IfeltnervousbecauseIwassoontoleavehomeforthefirsttime.Weweretohavebeenmarriedlastyear.PracticeCompletethefollowingsentencesusingmodalverbs.You’vebeenworkingallday.You______beverytired.2.Iwonderwhothatis.It_____beLisa.She’sinthelibraryatthistime.3.Itisalongtimesincewemetlasttime.You_______comeandseeusmoreoften.4.Ihaven’tdecidedwhereI’mgoingformyholidays.I_____gotoAustralia.mustcan’tshouldmayCompletethefollowingsentencesusingmodalverbs.5.Myfather’sbirthdayiscoming.What_____Igethim?6.Whydon’tyoutryonthisdress?It_______lookniceonyou.7.—Whowasthemantalkingwithyourteacher?—I’mnotsure.It______beherbrother.8.Idon’tknowwhentheguestsbehere.They_________arriveatanytime.shallwillmightwill/couldCompletethefollowingsentencesthatdescribethefutureusingeitherformofthegivenverbs.1.PhilipboughttwoticketsforThePhantomoftheOpera.He_____________________________(watch)

withhisgirlfriendontheweekend.2.IwassosurprisedatthenewsthatDavid________