Unit+5+The+Value+of+Money+Discovering+Useful+Structures高中英语人教版（2019）必修3

Unit5TheValueofMoneyDiscoveringUsefulStructures——Expressmodalityandtalkaboutfutureeventsinthepast情态动词&过去将来时1.Tolearnaboutthedifferentfunctionsofmodalverbs.2.Tobeabletotalkaboutfutureeventsinthepastusing“woulddo”and“was/weregoingtodo”.LearningobjectivesTherearethingsthatmustbedoneThatarenotyetbegunThingsthatImustdoWhenIwanttobewithyouAlthoughwe’refarapartYou’rewithmeinmyheartNooneelsewilldoIWannaToBeWithYouListentothesongandpayattentiontomodalverbsinthelyrics:IjustwanttobewithyouIwanttobewithyouCan’tyouhearme?IneedyounearmeIwanttobewithyouIneedyounearme,myloveLead-in一、情态动词的特征情态动词有一定的意义，表示或暗示某种情绪或态度，表示可能、建议、愿望、必要、允许、能力等。大多数情态动词有多个意义。2.情态动词没有人称和数的变化，即不随主语的不同而变化。3.情态动词不能独立使用，须后接动词原形，一起构成谓语动词。4.情态动词除ought和have外，后面接不带to的不定式。(dare)5.情态动词没有非谓语形式，即没有不定式、分词等形式。Reviewofmodalverbs1.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,dareshall/should,will/wouldhaveto,usedtoModalverbshavemanyfunctionsasfollows:A.necessity B.possibility C.obligationD.request E.advice F.intention需要

可能

职责/义务要求

建议

意图三、情态动词的功能Youhavetoreadbetweenthelinesbecausetherealmessagesareoftenhidden…Itmayseemluckytoyou.Astronautsmustwearspacesuitswhentheyworkinspacebecause…

Mayweaskwhatyou’redoinginthiscountry?Youshould/oughtto/hadbettergotoclassrightaway.Whatwouldyoudoifyouwereinhersituation?necessity表必要性possibility表可能和推测obligation表义务性request表请求或指示advice表建议intention表意图和愿望Task2：Findmodalverbsanddiscusstheirfunctions.A.necessityB.possibilityC.obligationD.requestE.adviceF.intentionTheusageofthemodalverbs1.can&could2.may和might3.will和would4.shall和should5.must1.can&could能力，猜测，请求,许可Someofuscanusethecomputernow,butwecouldn’ttenyearsago.Youcanhavemyseat.Iamgoingnow.Could

Ihaveadrinkofwater,please?Canhestillbealiveafterallthistime?Ifyou’renotcareful,youcouldgetintoevenworsetrouble.能力许可请求猜测猜测could表请求，比can更委婉。Could表推测的可能性比can小can/couldhavedone

can’t/couldn’thavedoneYou_______________(have)abettermarkifyouwentoverthevocabulary.Isawhimjustnow,sohe___________________(go)abroad.couldhavehadcouldn’tbeengone本可以否定猜测注意can的惯用语Onhearingthestory,Icannothelplaughing.Youcannotbetoocarefulwiththem.Youcan’tbecarefulenough.cannothelp+动名词忍不住做某事cannottoo/enough“无论怎么样..也不为过,越…越好”

2.may和mightMayIhavealookatyourbook?Youmayusemaydictionarysolongasyoureturnitbefore7:00.He

may

bewaitingforyouatthestation.Theymay

havegotlost.可能性许可请求may/mighthavedone过去的猜测当句中出现“Iamnotsure”等表示不确定含义的时候,常选用may和might.I___(may/can)go,butIamnotquitesure.可能性：can>

could>

may>

might1.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.2.May可以表示祝愿或希望，而might不行。May

theybeveryhappyinthefuture.Mayyousucceedinthecomingyear.3.will和wouldVSusedtoAsk,ifyouwill,whotheowneris.MyfriendaskedifIwouldgowithhim.Will/Wouldyoupleasehaveacoffeeforme?Thiskindofclothes

won’twasheasily.That’sjustlikeher—shewouldloseherbaginthebus!意愿过去的意愿请求习惯would比will客气委婉Iwill

tellyousomethingimportanttomorrow.Willyoumarryme?（助动词）

（情态动词）would：“总是，总要”，过去反复发生的动作或某种倾向。usedto：“过去常常”，现在已没有这种习惯※usedto可与状态动词连用,would不可以e.g.Heusedtobeaquietboy.()Hewouldbeaquietboy.()√×wouldusedto1.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.4.shall和shouldVSoughttoVShadbetterYoushouldbepolitetoyourteachers.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.1.Youshouldhaveaskedforsomehelp.2.Youshouldn’thavetoldherthenews.表示推测shouldhavedone表示本该做某事（而实际上未做）

shouldn'thavedone表示本不该做某事（而实际上做了）must:肯定句表有把握的推测:“一定”。2)must:推测现在或正发生的事情：mustbedoing，

eg:他现在肯定呆在那里。Hemustbestayingthere.3)must推测已经发生的事：musthavedone

Ididn'thearthephone.I_______________________(我刚才没有听到电话，我想必是睡着了。)

musthavebeenasleep如何表示否定的猜测？can’teg:Shecan’thaveleftschool,forherbikeisstillhere.5.must注意：must用于一般疑问句中,肯定:must否定:

needn’t/don’thaveto（不必），mustn’t表示“禁止，不允许”

—Must

I

finish

all

assignments

at

a

time?

—Yes,you______.No,

you______________________

.mustneedn't/don’thavetoTask3:Readthepassageandfillintheblankswithsuitablemodalsverbsinthebox.1.may2.should3.must4.can5.oughtto6.would7.would8.might9.hadbetter10.might11.would过去将来时(ThePastFutureTense)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。过去将来时常用在主句谓语动词为过去时态的宾语从句中。过去将来时句子中有时包含时间状语thenextday、soon等。1.IaskedhimifPeterwouldarrivethenextday.2.Shetoldmeshewasgoingtoposttheparcel.3.Wewereabouttogotherewhenitbegintorain.4.Shedidn'tsaywhenshewascomingagainnexttime.5.IfeltnervousbecauseIwassoontoleavehomeforthefirsttime.6.Weweretohavebeenmarriedlastyear.1.would/should+动词原形2.was/weregoingto+动词原形*与would+动词原形相比，was/weregoingto+动词原形有打算、计划的含义。3.was/wereaboutto+动词原形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。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.Task4：Both“woulddo”and“was/weregoingtodo”canbetalkaboutfutureeventsorintentionsinthepast.Completethefollowingsentencesthatdescribethefutureinthepast.1.PhilipboughttwoticketsforThePhadomoftheOpera.He______________________________(watch)thismusicalwithhisgirlfriendontheweekend.2.IwassosurprisedatthenewsthatDavid_________________________________(play)theroleofthedinosaurinth