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

Unit5TheValueofMoneyDiscoveringUsefulStructures——Expressmodalityandtalkaboutfutureeventsinthepast情態(tài)動詞&過去將來時(shí)1.Tolearnaboutthedifferentfunctionsofmodalverbs.2.Tobeabletotalkaboutfutureeventsinthepastusing“woulddo”and“was/weregoingtodo”.LearningobjectivesTherearethingsthatmustbedoneThatarenotyetbegunThingsthatImustdoWhenIwanttobewithyouAlthoughwe’refarapartYou’rewithmeinmyheartNooneelsewilldoIWannaToBeWithYouListentothesongandpayattentiontomodalverbsinthelyrics:IjustwanttobewithyouIwanttobewithyouCan’tyouhearme?IneedyounearmeIwanttobewithyouIneedyounearme,myloveLead-in一、情態(tài)動詞的特征情態(tài)動詞有一定的意義，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。大多數(shù)情態(tài)動詞有多個意義。2.情態(tài)動詞沒有人稱和數(shù)的變化，即不隨主語的不同而變化。3.情態(tài)動詞不能獨(dú)立使用，須后接動詞原形，一起構(gòu)成謂語動詞。4.情態(tài)動詞除ought和have外，后面接不帶to的不定式。(dare)5.情態(tài)動詞沒有非謂語形式，即沒有不定式、分詞等形式。Reviewofmodalverbs1.只作情態(tài)動詞的：2.可情態(tài)可實(shí)義的：3.可情態(tài)可助動詞的:

4.相當(dāng)于情態(tài)動詞的:

二、情態(tài)動詞的分類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

職責(zé)/義務(wù)要求

建議

意圖三、情態(tài)動詞的功能Youhavetoreadbetweenthelinesbecausetherealmessagesareoftenhidden…Itmayseemluckytoyou.Astronautsmustwearspacesuitswhentheyworkinspacebecause…

Mayweaskwhatyou’redoinginthiscountry?Youshould/oughtto/hadbettergotoclassrightaway.Whatwouldyoudoifyouwereinhersituation?necessity表必要性possibility表可能和推測obligation表義務(wù)性request表請求或指示advice表建議intention表意圖和愿望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，猜測，請求,許可Someofuscanusethecomputernow,butwecouldn’ttenyearsago.Youcanhavemyseat.Iamgoingnow.Could

Ihaveadrinkofwater,please?Canhestillbealiveafterallthistime?Ifyou’renotcareful,youcouldgetintoevenworsetrouble.能力許可請求猜測猜測could表請求，比can更委婉。Could表推測的可能性比can小can/couldhavedone

can’t/couldn’thavedoneYou_______________(have)abettermarkifyouwentoverthevocabulary.Isawhimjustnow,sohe___________________(go)abroad.couldhavehadcouldn’tbeengone本可以否定猜測注意can的慣用語Onhearingthestory,Icannothelplaughing.Youcannotbetoocarefulwiththem.Youcan’tbecarefulenough.cannothelp+動名詞忍不住做某事cannottoo/enough“無論怎么樣..也不為過,越…越好”

2.may和mightMayIhavealookatyourbook?Youmayusemaydictionarysolongasyoureturnitbefore7:00.He

may

bewaitingforyouatthestation.Theymay

havegotlost.可能性許可請求may/mighthavedone過去的猜測當(dāng)句中出現(xiàn)“Iamnotsure”等表示不確定含義的時(shí)候,常選用may和might.I___(may/can)go,butIamnotquitesure.可能性：can>

could>

may>

might1.對may的一般疑問句的肯定回答可用may或can,但作否定回答時(shí)要用mustn't或can't?！狹ay(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!意愿過去的意愿請求習(xí)慣would比will客氣委婉Iwill

tellyousomethingimportanttomorrow.Willyoumarryme?（助動詞）

（情態(tài)動詞）would：“總是，總要”，過去反復(fù)發(fā)生的動作或某種傾向。usedto：“過去常?！?，現(xiàn)在已沒有這種習(xí)慣※usedto可與狀態(tài)動詞連用,would不可以e.g.Heusedtobeaquietboy.()Hewouldbeaquietboy.()√×wouldusedto1.在一、三人稱的疑問句中,shall用來詢問對方的意愿。Shallwebeginourlesson?2.用于二、三人稱的陳述句中,表說話人命令、警告、允諾等口吻。HeshallhavethebookwhenIfinishreading.4.shall和shouldVSoughttoVShadbetterYoushouldbepolitetoyourteachers.3.should表示勸告、建議、命令，用于各種人稱。4.should表示說話人的驚訝、憤怒、失望等特殊情感，意為“居然，竟然”。Amazing!Youshouldwearslippersatwork.1.Youshouldhaveaskedforsomehelp.2.Youshouldn’thavetoldherthenews.表示推測shouldhavedone表示本該做某事（而實(shí)際上未做）

shouldn'thavedone表示本不該做某事（而實(shí)際上做了）must:肯定句表有把握的推測:“一定”。2)must:推測現(xiàn)在或正發(fā)生的事情：mustbedoing，

eg:他現(xiàn)在肯定呆在那里。Hemustbestayingthere.3)must推測已經(jīng)發(fā)生的事：musthavedone

Ididn'thearthephone.I_______________________(我剛才沒有聽到電話，我想必是睡著了。)

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

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

—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過去將來時(shí)(ThePastFutureTense)過去將來時(shí)表示從過去某一時(shí)間來看，將要發(fā)生的動作或存在的狀態(tài)。過去將來時(shí)常用在主句謂語動詞為過去時(shí)態(tài)的賓語從句中。過去將來時(shí)句子中有時(shí)包含時(shí)間狀語thenextday、soon等。1.IaskedhimifPeterwouldarrivethenextday.2.Shetoldmeshewasgoingtoposttheparcel.3.Wewereabouttogotherewhenitbegintorain.4.Shedidn'tsaywhenshewascomingagainnexttime.5.IfeltnervousbecauseIwassoontoleavehomeforthefirsttime.6.Weweretohavebeenmarriedlastyear.1.would/should+動詞原形2.was/weregoingto+動詞原形*與would+動詞原形相比，was/weregoingto+動詞原形有打算、計(jì)劃的含義。3.was/wereaboutto+動詞原形4.go,come,leave,start,meet等動詞的過去進(jìn)行時(shí)，表示就過去的某一時(shí)刻而言即將發(fā)生的動作。5.was/weretodo;表示曾經(jīng)計(jì)劃做某事，并且從現(xiàn)在看已經(jīng)實(shí)現(xiàn)。當(dāng)表示“原計(jì)劃做某事但是最終未發(fā)生”，用was/weretohavedone.Task4：Both“woulddo”and“was/weregoingtodo”canbetalkaboutfutureeventsorintentionsinthepast.Completethefollowingsentencesthatdescribethefutureinthepast.1.PhilipboughttwoticketsforThePhadomoftheOpera.He______________________________(watch)thismusicalwithhisgirlfriendontheweekend.2.IwassosurprisedatthenewsthatDavid_________________________________(play)theroleofthedinosaurinth