Unit+5+The+Value+of+Money+Discovering+Useful+Structures+高中英语人教版（2019）必修第三册

Unit5TheValueofMoneyDiscoveringUsefulStructuresTeachingObjectives:1.Mastertheusagesofmodelverbsandthepastfuturetense.2.Usemodelverbstoexpresspropermeaningsinconversations.3.UsethepastfuturetensefreelytotalkaboutfutureeventsorintentionsinthepastKeyanddifficultpoints:Keypoint：Understandtheusagesandfunctionsofmodelverbsinrealcontexts.Difficultpoint：Howtochoosesuitablemodelverbstoexpressyourselfandtalkaboutsituationsinthepastusingthepastfuturetense.Modalverbs01Readthesentencesbelowandthink.Whatarethefunctionsandmeaningsofthesemodalverbs?Mayweaskwhatyou'redoinginthiscountryandwhatyourplansare?Ican'tsaythatIhaveanyplans.Youmustn'tworryaboutthat.Couldyouoffermeworkhere?necessityB.possibilityC.obligationD.requestE.adviceF.intentionnecessityB.possibilityC.obligationD.requestE.adviceF.intention1.Youhavetoreadbetweenthelinesbecausetherealmessagesareoftenhidden…2.Itmayseemluckytoyou.3.Astronautsmustwearspacesuitswhentheyworkinspacebecause…4.Mayweaskwhatyou’redoinginthiscountry?6.Youshould/oughtto/hadbettergotoclassrightaway.7.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表意图和愿望情态动词概述用来表明说话者情绪、态度和语气等的动词，叫做情态动词。它表示人的能力、推测、请求、义务、意愿、需要等。情态动词本身具有一定的词义，但不能单独作谓语，需要和其他实义动词一起构成谓语。情态动词无人称和数的变化(haveto除外)，但有些情态动词有过去式。否定式一般在其后加not，疑问句中一般将其置于主语之前。常用的情态动词主要有can,could,may,might,must,shall,should,will,would,oughtto,need,dare,usedto,haveto,hadbetter等。情态动词的分类1.只作情态动词的：can/could,may/might,oughtto,must2.可情态可实义的：need,dare/dared3.可情态可助动词的:shall/should,will/would4.相当于情态动词的:haveto,usedto情态动词的分类can&could(1)表能力，“能，会”can意为“能够,能,会”,指本能、体能、智能、技能等一般性能力,表示能够做某事。Thelittlegirlcanspeakfourlanguages.这个小女孩会说四种语言。Whocanopenthebottlecover?谁能打开这个瓶盖?Mymothercan'tusethecomputeryet.我妈妈还不会使用电脑。情态动词的分类can&could(2)表请求和许可，"可以"，could比can更加委婉，表示礼貌。—CouldIuseyourcomputer?我能用一下你的电脑吗？—Yes,youcan.可以，用吧。(3)can表客观可能性，“有时候会”，用于肯定句Awisemancansometimesmakeamistake.智者有时也会犯错。(4)can表推测，用于疑问句、否定句。肯定句用mustShecan’tbeathomebecauseIsawherherejustnow.她不可能在家，因为我刚才看到她在这里。情态动词的分类may&might1.表示请求或允许，译为“可以”。might语气较委婉(但并非表示过去)。IwonderifImightaskyouafavor?我想请你帮个忙，可以吗？2.表示推测,译为“可能”。might比may所表示的可能性更小。Thatmay/mightnotbetrue.这不可能是真的。情态动词的分类may&might3.may/mightwell(很可能);may/mightaswell(不妨，还是...为好)。It’sfreezingcoldoutside.Wemayaswellstayathome.外面太冷了。我们还是待在家里吧。

4.may放在句首，表示祝愿。MayGodblessyou!愿上帝保佑你们！情态动词的分类shall&should&oughtto1.表示义务或责任,译为为“应该”。Weshould/oughttolearnfromeachother.我们应该相互学习。2.表示建议或劝告，译为为“可以，应该”。Youshould/oughttotryyourbesttobetteryourperformance.你应该尽力提高自己的成绩。情态动词的分类shall&should&oughtto3.表示推断,译为"应该","可能","按道理会"。Theyshould/oughttobetherebynow.他们现在应该在那里了。4.should表示意外或惊讶，译为“竟然”。It'sstrangethatheshouldcomesolate.奇怪，他怎么这么晚才来。情态动词的分类must&havetoMust

MustIdomyhomeworknow?我一定要现在做作业吗？1.must表示“必须”(侧重于主观意愿);mustn’t表示“禁止”。Youmustn'tsmokehere.你不能在这里吸烟。2.must表示推测，译为“准是，一定是”(只用于肯定句)。若用于否定句或疑问句，则用can’t(一定不是)。Thatcan'tbetheonlyway.Theremustbeotherwaysofsolvingtheproblem.这不可能是唯一的办法。一定还有其他方法可以解决问题。情态动词的分类must&havetoHavetoIdon’thavetogetupearly.我不必早起。“必须，不得不”，表示客观需要。而must表示说话人的主观看法。Ihadtogetupearly.我必须早起。情态动词的分类will&wouldIfyouwanttoreadthebook,Iwillgiveittoyou.如果你想读这本书，我可以给你。用法 说明与各种人称连用，用于陈述句中。表示主语的意志、意愿或决心。will指现在，would指过去。表示征求意见或提出请求。多用于第二人称疑问句中。would比will语气委婉。表示习惯性动作、固有属性或必然趋势。此时意为“总是；习惯于”。will指现在,would指过去。Will/Wouldyoupleaseclosethewindow?请把窗户关上好吗?情态动词的分类need&dare用法 说明need和dare既可用作情态动词，也可用作实义动词。

need作情态动词时,表示“需要”,常用于否定句和疑问句中。needn’t表示“不必”;对need引出的一般疑问句作肯定回答时用must而不用need，作否定回答时用needn’t。dare作情态动词时,表示“敢,胆敢”,后跟动词原形,常用于疑问句、否定句和条件句中。Youneedn’ttelephonehimnow.你现在不必打电话给他。Shedarenotgooutaloneatnight.她晚上不敢一个人出去。情态动词的分类hadbetterhadbetter表示"最好"，其缩写为"'dbetter"，表示"最好做某事"。结构 说明hadbetter的基本式hadbetter意为“最好”“应该”，后接动词原形。hadbetter的否定式通常将not置于hadbetter之后。hadbetter的疑问式通常将had置于主语之前。hadbetter+完成式表示最好做完某事或本该做某事而未做。It’sverycoldoutside.You’dbetterputonmoreclothes.外面很冷，你最好多穿些衣服。PastFutureTense02过去将来时过去将来时的含义过去将来时表示从过去的某一时间来看将来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。过去将来时的句子中有时包含时间状语thenextday、soon等。Iknewyouwouldagree.我知道你会同意的。Hepromisedthathewouldnotopentheletteruntil2o’clock.他许诺两点钟之前不会打开信。过去将来时的用法过去将来时的基本结构是“would+动词原形”，否定式是在would后面加not。Thedirectorsaidhewouldmeetthefamousactorthenextday.导演说他会在第二天与那个著名演员见面。表示过去将来时的其他结构:Marysaidshewasgoingtostartoffatonce.玛丽说她将立即出发。①was/weregoingto+动词原形过去将来时的用法表示过去将来时的其他结构:②was/wereto+动词原形Thebuildingwastobecompletednextmonth.这座建筑将在下个月竣工。Wewereabouttoleavetherewhenitbegantorainheavily.我们正要离开，这时候下起了大雨。③was/wereaboutto+动词原形过去将来时的用法表示过去将来时的其他结构:④come、go、leave、arrive、start等词可用过去进行时代替过去将来时。Shetoldmeshewascomingtoseeme.她告诉我她要来看我。⑤在条件状语从句和时间状语从句中常用一般过去时代替过去将来时。Shetoldusthatshewouldnotgowithus,ifitrained.她告诉我们，如果下雨的话，她就不和我们一起去了。Practice03Readthepassageandfillintheblankswithsuitablemodalverbsinthebox.mayshouldmustcanoughttowouldmighthadbettermightwouldBoth"woulddo"and"was/weregoingtodo"canbeusedtotalkaboutfutureeventsorintentionsinthepast.Completethefollowingsentencesthatdescribethefutureusingeitherformofthegivenverbs.1.PhilipboughttwoticketsforThePhantomoftheOpera.He_________________________________(watch)thismusicalwithhisgirlfriendontheweekend.wouldwatch/wasgoingtowatch2.IwassosurprisedatthenewsthatDavid_____________________________(play)theroleofthedinosaurintheplaythatIgavehimahugoutofjoy.3.Lilydecidedthatshe_______________________________(settle)inNewYorkandpursueherdreamofbecominganactress.wouldsettle/wasgoingtosettle4.Hey,Timmy.I______________________(call)you.Butnowthatyouarehere,Idon'thaveto.wasgoingtocall5.Thecompetitionwassoclosethatnoonewassurewho____________(win)theBestActoraward.wouldwin6.Jimisnothererightnow.Hesaidhe_________________________(be)ondutyatthelibrarythisafternoon.wouldplay/wasgoingtoplaywouldbe/wasgoingtobeFillintheblankswithmay,might,can,couldn’t.1.Samuel,thetallestboyinourclass,____________easilyreachthebooksonthetopshelf.can2.Itwasreallyannoying;I____________getaccesstothedatabankyouhadrecommended.couldn’t3.Itwassonoisythatwe____________hearourselvesspeak.couldn’t4.____________Ihaveawordwithyou?Itwon’ttakelong.Can5.You____________feelallthetrainingawasteoftime,butI’mahundredpercentsurelateryou’llbegratefulforit.may6.Lifeisunpredictable;eventhepoorest____________becometherichest.mightVocabulary04obligationn.义务;职责;责任legalobligation法律义务asenseofobligation责任感undernoobligationtodosth.没有义务做某事fulfilone’slegalobligations履行某人的法律责任练习：Whenteachersassignhomework,studentsusuallyfeel_______obligationtodoit.anintentionn.打算;计划;意图;目的havenointentionofdoingsth.不打算做某事haveafirmintention有坚定的意志byintention故意地withtheintentionof...有……目的/意图练习：TheheadmasterintendedJim___________(deliver)aspeechinfrontofthewholeschool.todeliverintendvt.计划，打算intendtodosth./intenddoingsth.想要/打算做某事intendedadj.意欲达到的;为······打算(或设计)的beintendedtodosth.打算