Unit5TheValueofMoneyDiscoveringUsefulStructures(教学课件)高一英语人教版2019

Unit5TheValueofMoneyDiscoveringUsefulStructures

P54

Modalverbs情态动词Leading-inMayweaskwhatyou'redoinginthiscountryandwhatyourplansare?Ican'tsaythatIhaveanyplans.Youmustn'tworryaboutthat.Couldyouoffermeworkhere?Readthesentencesbelowandthinkabout:Whatarethefunctionsandmeaningsofthesemodalverbs?A.necessityB.possibilityC.obligationD.requestE.adviceF.intention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。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,dareshall/should,will/wouldhaveto,usedtoExampleNecessityPossibilitiesObligationRequestAdviceIntentionWecandiscussitnow.Youmustdoitatonce.Wouldyoupleasepassmethesalt?Youneedn’thavestayed.Yououghttohelphim.Iwouldratherdoitmyself.can&could情态动词的用法(1)表能力，“能，会”ShecanspeakEnglish.Shecouldplaythepianoattheageofthree.beableto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//succeededindoingsthAllthepeopletrappedintheburninghousewereabletogetoutofit.(2)表请求和许可，“可以”，could比can更加委婉，表示礼貌CanIsmokehere?—CouldIuseyourcomputer?—Yes,youcan.(3)can表客观可能性，“有时候会”，用于肯定句Awisemancansometimesmakeamistake.(4)can表推测，用于疑问句、否定句。肯定句用mustCanthenewsbetrue?Hecan’tbeathomebecauseIsawhimherejustnow.can/could与beableto的区别1.Themancan/couldspeaktwoforeignlanguages.2.YesterdayIwasabletogethomebeforetheheavyrain.can/could表示_________________，而beableto通常表示通过努力达成的_____________;can/could主要是一般现在、一般过去时,而beableto有较为丰富的时态变化。习惯性具备的能力一次性的能力may和might

MayIhavealookatyourbook?Youmayusemaydictionarysolongasyoureturnitbefore7:00.Hemaybewaitingforyouatthestation.Theymayhavegotlost.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。Maytheybeveryhappyinthefuture.Mayyousucceedinthecomingyear.shall&should&oughttoshallshall用于第一、三人称疑问句中，表示说话人征求对方的意见和向对方请示，“…好吗？要不要…？”ShallIopenthewindowforyou?Shallhefetchsomewaterforyou?shall用于第二、三人称陈述句中，表示说话人给对方的许诺、命令、警告、威胁。YoushalldoasIsay.Tellhimthatheshallhavethebooktomorrow.Heshallbepunished.shall&should&oughttoShould/Oughtto1.表示义务或责任,译为为“应该”。Weshould/oughttolearnfromeachother.2.表示建议或劝告，译为为“可以，应该”。Youshould/oughttotryyourbesttobetteryourperformance.3.表示推断,译为”应该”,“可能”,“按道理会”。Theyshould/oughttobetherebynow.4.should表示意外或惊讶，译为“竟然”。

It'sstrangethatheshouldcomesolate.①IhavetowaitherebecauseIhavenoumbrellawithme.②Imustrecitethetextthismorning.③—Mustwehandinourexercisebookstoday?—Yes,youmust./No,youdon’thaveto/youneedn’t.④Youmustn’tsmokehere.⑤Yourmothermustbewaitingforyounow.⑥Whymustyoualwaysinterruptme?(1)①句中haveto和②句中must均表示“______”，但______是指说话人的主观看法，而________则强调客观需要。(2)③句中must所构成的疑问句，回答的否定形式通常为__________________或________，意为“不必要”，而一般不说____________(④句中mustn’t表示“禁止”)。must&haveto必须musthavetoneedn’tdon’thavetomustn’twill&would表示意愿、意志IfyouwillhelpmewithmyEnglish,Iwillbeveryhappy.

在疑问句中，用于第二人称，表示请求或征求意见，would比will语气更委婉Will/Wouldyoupleasegivemeahand?表示习惯性的动作，“总是，常常”Theoldmanisstrange.Hewillsitforhourswithoutsayinganything.WhenIwasachild,mymotherwouldreadmeastoryeverynight.need1.need用作情态动词，表示“需要”(无时态与人称的变化)。Ineedyourhelp.Sheneednotanyhelp.(否定时，直接在情态动词后+not)2.need用作实义动词，通常为“needtodosth”结构或“need+n”(有时态与人称的变化)。needtobedone=needV-ingLilyneedsmoremoneytopayforthatbook.(时态变化)

Lilyneededmoremoneytopayforthatbookatthattime.(人称数的变化)Lilydoesn’tneedanymoremoneytopayforthatbook.(否定，添加助动词)①Ifhedarego,I’llgowithhim.②Tomdidn’tdare

todoit.(1)dare作情态动词时，表示“__________”。常用于否定句和疑问句中，后接动词原形，否定形式为_________。(2)dare常用作_________，有________________的变化，后面可接________________

。(3)dare作为实义动词，有如下搭配：

daretodosth

敢于做某事

daresb

todosth

激某人做某事 dare敢；

敢于darenot实义动词时态、人称和数带to的不定式Readthepassageandfillintheblankswithsuitablemodalverbsinthebox.maymustcanoughttomighthadbetterwouldshouldInthefilmTheMillionPoundBankNote,HenryAdamsisstuckinaforeigncountrywithoutmoneyandfriends,andwithnowheretostay.Whilethissituation_____seemunusual,itcansometimeshappentotravellers.Incaseithappenstoyouonatripabroad,what______youdo?First,andmostimportantly,you_____staycalm.Fear____causeyoutobecomeconfused.Youneedtothinkclearly.Second,youshouldgotoyournearestconsulate.They________beabletohelptosomeextent.Third,you______dowelltocheckwithsomelocalcharities.They______offerhelptotravellersinneed.Fourth,you_________avoidgettingintotrouble.You______thinkthatstealingsomemoneyorfoodwouldhelpyou,butyoushouldnotdoso.Gettingcaught______ruinyourlife.mayshouldmustcanoughttowouldmighthadbettermightwouldThePastFutureTense过去将来时过去将来时(ThePastFutureTense)

过去将来时表示在过去某一时间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.wasnotgoingtogivealoantohimThe

clerk

in

the

consulate

told

Henry

thatthey_______________________________(not,give,aloan).Henryenteredthegentlemen’shouse,wonderingifthey____________________(offer,ajob).ThegentlemensaidthatHenry____________________(know,everything)inanhourandahalf.ExercisewouldofferhimajobwouldknoweverythingCompletethesentencewithwould,was/weregoingto,andthewordsinbrackets.wasgoingtoexplainwhyhewasn’tpaythebill4.Henry___________________________________________(explainwhy,notpay,thebill)rightawaywhenthewaiterbecameimpatient.5.Theownerofthetailor’sshopneverthoughthe___________________________(hold,suchalargenote).6.Afteronemonth,HenrywenttoseethegentlemenwithPortia.He___________________________(giveback,note).wouldholdsuchalargenotewasgoingtogivebackthenoteExerciseCompletethefollowingsentencesthatdescribethefutureusingeitherformofthegivenverbs.1.PhilipboughttwoticketsforThePhantomoftheOpera.He_____________________________(watch)withhisgirlfriendontheweekend.2.IwassosurprisedatthenewsthatDavid___________________________(play)