人教版 (2019)必修 第三册Unit 5 The Value of Money课堂教学课件ppt

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Sectin Ⅱ　Discvering Useful Structures
语法点拨一、情态动词(一)can/culd1．表示能力，can表示现在的能力，culd主要指过去的能力。Yu can tell the significance f climate change t us.你可以告诉我们气候变化的重要意义。I had hped t send Peter a gift t cngratulate him n his marriage, but I culdn't manage it.我本来希望送给彼得一件礼物祝贺他结婚，但没有做到。
can表示能力的时候，还可以用be able t代替，表示后来通过努力终于做成了某事。He was a gd swimmer s he was able t swim t the riverbank when the bat sank.他是一个很擅长游泳的人，所以当船下沉时，他能够游到河岸上。
2．表示请求或许可。当请求允许做某事时，两者均可用，但用culd语气更委婉。当表示允许某人做某事时，一般要用can，而不用culd。—Can/Culd I use yur bike tmrrw mrning?—Yes, yu can./N，I'm afraid nt.——我明天早晨能用你的自行车吗？——是的，可以。/不，恐怕不行。Yu can g with them if yu like.如果你愿意的话，可以和他们一起去。
3．表示推测。can表推测时一般用于否定句和疑问句中(culd一般无此限制)。表示对过去发生的行为怀疑或不肯定时，常用“can/culd＋have＋过去分词”的否定或疑问形式。It can't/culdn't be true.那不可能是真的。Can/Culd he have heard the news?他听说过这个消息了吗？
4．表示客观的、一时的情况，意思是“有时候会”。The weather in Shanghai can/culd be very cld in winter.上海冬季可能很冷。5．表示惊异、怀疑，不相信的态度(主要用在否定句、疑问句或感叹句中)。Hw can yu be s careless!你怎么那么粗心呀！
选词填空(can/culd/be able t)①My grandma is well ver eighty, but she _____ read withut glasses.②Being a wise persn, he finally _____________ find the place.③The cheater said that he _______ turn stne int gld.
was able t
(二)may/might1．表示请求或允许，might可以指过去时间，也可指现在时间，语气更委婉。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。Yu may cme if yu wish.如果你想来，你就来。May(Might) I ask fr a pht f yur baby?我可以要一张你宝宝的照片吗？
—May I smke here?—N，yu mustn't.Yu'd better nt.——我可以在这里吸烟吗？——不，不可以。你最好不要吸烟。
2．表示可能。可以指过去时间，也可以指现在时间，但语气不肯定。The crwds might damage the beauty f the place.人群可能会破坏这个地方的美。She may nt knw abut it.她可能不知道这件事。3．用于表祝愿的句子中。May bth the bride and grm have happy lives.祝新娘新郎幸福绵长。
①—Are yu ging t her party?—I'm nt sure.I _______ stay hme and help my brther with his hmewrk.②_____ yu have a happy weekend.
(三)must/have t1．must表示必须，没有时态变化。强调的是一种主观看法，也表示责任或义务。have t表示“必须，不得不”，是由于某种外界(客观)原因而“必须，不得不”做某事。mustn't表示禁止做某事；have t的否定形式表示“不必”。have t可用于多种时态中。I wrk nt because I have t, but because I want t.我工作不是因为我不得不做，而是因为我想做。(客观上需要做这件事)Yu must keep these pints in mind while setting yur gals.在设定目标时，你必须牢记这些要点。(主观上要做这件事)
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dn't have t。—Must we hand in ur exercise bks nw?—Yes, yu must.(N, yu needn't./N，yu dn't have t.)——我们现在就必须要交练习本吗？——是的，必须。(不，不必)。
2．must表示猜测。意为“想必，准是，一定”，只用于肯定句。The bk must be the ne yu want.这本书一定是你要的那本。She's wearing a diamnd necklace.She must have a lt f mney.她戴着钻石项链，她一定很有钱。3．must还可表示“偏要”。表示说话人不耐烦、不满的情绪。Why must it rain n Sunday?为什么偏要在星期天下雨？
用适当的情态动词填空①My sister is ill; my mther ________ lk after her.②There's a lt f nise frm next dr.They ______ be having a party.③—Must I return all the bks in three days?—Yes, yu ______.(N, yu ____________________.)④If yu ______ g, at least wait until the strm is ver.
needn't/dn't have t
(四)shall1．表示征询意见，用于第一、第三人称疑问句。Shall I get yu sme mre tea?再来点茶好吗？Shall the by wait utside?让那男孩在外面等吗？
2．表示说话人的意愿，有“命令、允诺、警告、决心”等意思，用于第二、第三人称陈述句。Yu shall cme n time.你必须准时到。(命令)He shall have the bk when I finish reading it.我读完这本书就给他。(允诺)Nthing shall stp us frm carrying ut this plan.没有什么事情能阻止我们实施这项计划。(决心)N reader shall remve a bk frm the library withut permissin.未经许可，读者不准把书带出图书馆。(警告)
3．表示强制，用于法令、条约、规章中，意为“必须；应该”。One f ur rules is that every student shall wear schl unifrm while at schl.我们规定中的其中一项是：每位学生在校期间都要穿校服。Each part shall respect the articles f this cntract.任何一方都要尊重合同的条款。
写出下列句中shall的含义①Yu shall fail if yu dn't wrk harder. __________②Yu shall get an answer frm me tmrrw. __________③Yu shall be punished fr what yu've dne. __________④Shall I watch TV fr a while？__________
(五)shuld1．表示义务、责任，意为“应该”，用于各种人称。(2019·北京高考)Students shuld have a prper attitude twards cllege befre thinking abut which cllege t attend.在考虑上哪所大学之前，学生应该对大学有一个正确的态度。Yu shuld be plite t yur teachers.你对老师应该有礼貌。
2．表示可能性很大的猜测，说明说话人对客观事物的真实性作出较大可能的判断，意为“想必一定，照说应该；估计”等。The film shuld be very gd as it is starring first-class actrs.这部电影是一流演员主演的，估计拍得很好。3．表示说话人的惊讶、愤怒、失望等特殊情感，意为“居然，竟然”。Amazing! Yu shuld wear slippers at wrk.真令人惊讶，你竟然穿着拖鞋上班！
单句语法填空①Such a clever by ________ fail the exam.②We ________ bey the schl rules and wrk hard.③It's already 10.She prmised t cme by 10.She ________ be here at any mment.
(六)will/wuld1．表示意志或意愿。will指现在，wuld指过去，用于否定句表示“不肯，不乐意”。I will never d that again.我决不会再做那种事了。2．表示征求意见或提出请求。主要用于第二人称疑问句中，will和wuld均可用，wuld此时不表示过去，而是表示委婉语气。Will/Wuld yu pass me the bk?请你把书递给我好吗？
3．will和wuld可分别表示现在和过去反复发生的动作或某种倾向，意为“总是；常常”。Fish will die withut water.没有水，鱼会死去。He wuld sit there fr hurs smetimes ding nthing at all.有时他在那里一坐几个小时，什么也不做。(2019·江苏高考)I wuld be happy t wear traditinal Chinese clthes at the welcme ceremny.我很乐意在欢迎仪式上穿中国传统服装。
单句语法填空①He _______ g t the river nearby t fish n weekends when he was yung.②—Srry, I frgt t tell Jhn abut yur party.—Desn't matter.I ______ call him in a while.③_______ yu pen the windw, please? I feel it is a little stuffy here.
(七)need1．用作情态动词，need意为“需要，有必要”，一般用于否定句或疑问句中。疑问句中把need提前，否定形式是在need后加nt。Yu needn't cme here this afternn.你今天下午不必来。
2．用作实义动词，意为“需要，有必要”，可以用于各种句式中。Yu dn't need t g nw.你不必现在就走。I need t have a rest.我需要休息一下。D we need t finish all the wrk tday?我们今天需要完成所有的工作吗？
单句语法填空①—Must I stay here?—N, yu ________.②Yu ______ nt be tld twice abut ne single thing.
(八)dare1．dare作情态动词时，常用于疑问句、否定句和条件从句中，过去形式为dared。Hw dare yu say I'm unfair?你怎么敢说我不公平？He daren't speak English befre such a crwd, dare he?他不敢在这么多人面前说英语，是吗？If we dared nt g there that day, we culdn't get the beautiful flwers.如果那天我们不敢去那里，我们就得不到美丽的花。
2．dare作实义动词用时，有人称、时态和数的变化。在肯定句中，dare后面常接带t的不定式。在疑问句和否定句中，dare后面可接带t或不带t的不定式。I dare t swim acrss this river.我敢游过这条河。He desn't dare (t) answer.他不敢回答。
单句语法填空①Hw ______ yu fight against him?②Nw ne ______ say he had nthing n.
二、过去将来时1．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，常用在宾语从句中。一般由“wuld/shuld＋动词原形”构成。She hped that they wuld meet again smeday.她希望将来有一天他们能再见面。I rang up t tell my father that I shuld leave fr Lndn.我打电话告诉我父亲我要去伦敦。
2．was/were ging t＋动词原形：表示过去将要发生或很有可能发生的动作，常用于口语中，表示预言、意图或者打算等。He was ging t start wrk the fllwing week.他打算下星期开始工作。—Alice, why didn't yu cme yesterday?—I was ging t, but I had an unexpected visitr.——爱丽丝，你昨天为什么没来呀？——我打算去的，但我家来了个不速之客。
3．was/were abut t d：常用来表示过去即将发生的动作，“刚要/正要做……”。注意该结构不与任何时间状语连用。I felt that smething terrible was abut t happen.我感到某种可怕的事情即将发生。We were abut t g there when it began t rain.我们刚打算去那儿，这时天下起了雨。
4．start，g，cme，leave，see，meet等动词的过去进行时：表示就过去某一时刻而言即将发生的动作。She was cming later.她随后就来。I had just put n my vercat and was leaving t visit a friend f mine.我刚穿上外套要去看我的一个朋友。
5．was/were t d：表示“曾计划做某事”，如果表示过去“本来计划做某事，动作没实现”，则需用“was/were t have dne”。She said she was t have tld me abut the accident.她说她本来想告诉我关于事故的事。He said he was t meet his friend at the statin at 4 p．m.他说他下午四点去车站接他的朋友。
用所给动词的适当形式完成句子①She said the bus _____________(leave) at five the next mrning.②I wasn't sure whether he __________(lend) me his bk the next mrning.③At that time he did nt knw that quitting the jb _______________子(becme) the turning pint in his life.④He said he ____________________(visit) China the next week.⑤In his intrductin, he made it clear that ur credits __________(be) hard-earned.
was leaving
wuld lend
was t becme
was ging t visit
语法专练Ⅰ.用适当的情态动词填空1．(2019·全国Ⅲ卷)On ur way t the huse, it was raining s hard that we _________(can) help wndering hw lng it wuld take t get there.2．(2018·北京卷)They might ____________(find) a better htel if they had driven a few mre kilmeters.3．(2018·天津卷)I can't find my purse.I culd ___________(leave) it in the supermarket yesterday，but I'm nt sure.
have fund
have left
4．(2016·浙江卷)Managing the family budget must ___________(be) a very hard task，but she made it lk effrtless.5．(2015·福建卷)—Srry，Mum! I failed the jb interview again.—Oh, it's t bad.Yu ________(shall) have made full preparatins.6．(2018·天津卷)At first Rbert _________(will) let his daughter g diving，but eventually he gave in as she was s cnfident abut her skills.7．(2020·全国Ⅰ卷)Rather than getting caught up in hw yu culd ___________(d) better, why nt ffer yurself a cmpassinate(有同情心)respnse?
have been
8．(2019·天津卷)I dn't have t _______(write) dwn what happened.9．______she be ten years ld next mnth?10．—______yu interrupt nw? Can't yu see I'm n the phne?—Srry, sir，but it's an emergency.
Ⅱ.完成句子1．In tday's infrmatin age, the lss f data _____________________ fr a cmpany.在今天的信息化时代，丢失数据可能会给公司造成严重的问题。2．My rm is a mess, but I _________________ befre I g ut tnight.I can d it in the mrning.我的房间很乱，不过今晚在我出去之前，我没必要打扫它。我可以在(明天)早晨打扫。
can cause serius prblems
needn't clean it
3．(北京高考)Samuel, the tallest by in ur class, ________________ __________ n the tp shelf.塞缪尔是我们班最高的男孩，他能轻而易举地拿到书架顶层的书。4．She said that _____________________ withut yur help.她说，要是没有你的帮助，她不能做成。5．If yu attempt t practice yga, _________________________ at the beginning, but yu'll grw strnger in the lng run.当你尝试去练习瑜伽，也许在刚开始时你会感到疲倦，但是从长远来看这让你变得更强壮。
can easily reach the
she culdn't take it
yu may/might feel tired
6．She said she __________________________ her trip.她说她将为她的旅行作准备。7．I wndered when we ___________________ fr Paris.我想要知道我们什么时候动身去巴黎。8．He ___________________ when he saw a shark.他正要潜水时突然看见了一条鲨鱼。
was ging t prepare fr
shuld/wuld leave
was abut t dive
9．I still remember my happy childhd when my mther ________________ Disneyland at weekends.我仍然记得我快乐的童年，我的母亲周末会带我去迪士尼乐园。10．I knw yu have an imprtant perfrmance tnight. __________________我知道你今晚有个重要演出，祝你成功！
wuld take me t
May yu succeed
Ⅲ.语法主题应用用适当的情态动词、动词的过去将来时介绍一下你的高考备考情况。1．还有三个月就要高考了，这让我压力很大；2．因为我晚上熬夜，我竟然在课堂上睡着了；3．以往考得不好的时候，我的父母都会安慰我；4．现在我能进行自我调节了；5．我要遵守科学的作息规律；6．祝我在高考中取得好成绩。____________________________________________________________________________________________________________________
参考范文：The Cllege Entrance Examinatin will be in three mnths, which makes me under great pressure.Because I stay up late at night, I shuld fall asleep in class.My parents wuld cmfrt me when I didn't d well in the exam.Nw I can adjust myself. I shall bserve scientific wrk and rest rules.May I gain gd results in the Cllege Entrance Examinatin.