外研版 (2019)必修 第二册Unit 2 Let's celebrate!教学演示ppt课件

这是一份外研版 (2019)必修 第二册Unit 2 Let's celebrate!教学演示ppt课件，共19页。PPT课件主要包含了Leading-in，cancould，maymight，must，Exercise等内容，欢迎下载使用。
1.T get t knw sme mdal learn hw t use mdal verbs t make predictin.
Learning aims
Lk at the sentences frm the reading passage and answer the questins.
a That is why Letters frm Father Christmas culd be the perfect bk…b The children must have been very excited as they pened it.c … they might nt receive their presents if they were nt gd.
情态动词must, can/culd, may/might均可表示推测, 它们可以对过去、现在或将来的情况作出语气强弱不同的推测。
1. 把握推测语气的特点。表示肯定的推测时，各情态动词语气从弱到强依次为might → may → culd → can → must；表示否定的推测时, can’t / culdn’t语气较强，意为“不可能”；may nt / might nt语气较弱，意为“可能不”。
Grammar Mdal verbs(2)
注意：must的否定形式mustn’t不表示否定推测，而是表示“不许可”或“不应该”。
can＆culdmay＆mightmust
1.表示能力eg. I can speak fluent English nw , but I culdn’t last year.2.在肯定句中，表示客观可能性，并不涉及具体某事会发生，常用来说明人或事物的特征。要表达具体某事实际发生的可能性时，不用can，需用culd，may，might。eg. He can be very frgetful smetimes.3.表示对现在的动作或状态进行主观的猜测，主要用在否定句和疑问句中。eg.Can the man ver there be ur head master?
4.表示惊异、怀疑、不相信等态度，主要用在否定句、疑问句和感叹句中。eg.This can’t be true.5.表示请求和允许。表示请求，口语中常用culd代替can，使语气更委婉。
特别注意：（1）culd用来表示请求时，语气委婉，主要用于疑问句，不能用于肯定句，答语应用can（即：culd不能用于现在时态的简略答语中）。如：—Culd I use yur dictinary?—Yes, yu can.(否定回答可用：N, I’m afraid nt.)(2) can和be able t辨析can(culd)和be able t都可以表示能力，意思上没有区别。但can只有现在式和过去式，而be able t则有更多的形式。
1. It was s nisy that we________hear urselves speak.
2. —I_______thank yu enugh fr what yu have dne fr me. —Yu’re welcme. 3. 他有可能是我们的老师吗？______________________?
Can he be ur teacher
1.表示请求和许可，在疑问句中，might可以代替may，它表示的语气更加委婉。----May I have a few wrds with yur manager?----Yes, yu may.知识归纳：may nt表示“不可；不许”时，语气较强，有命令强制的意味，常可用mustn't代替，用来回答问句“May ”
2. 表示推测might和may表示对现在、将来的推测，多用于肯定句中或否定句中。对过去的推测要用may/might have dne.might比may的可能性更小。3. may可以用于祈使句中，表示祝愿，其结构为：May+主语+动词原形“。May yu succeed!祝你成功！
1. Helen ______ g n the trip with us, but she isn’t quite sure yet.2. —I left my handbag n the train, but luckily smene gave it t a railway fficial. —Hw unbelievable it is t get it back! I mean, smene_________have stlen it.
1.表示“必须，应该”之意，语气比shuld，ught t强烈。其否定形式mustn’t表示“不准，不应该，禁止”等意。eg.Everybdy must bey the law.2.在回答带有must的问句时，否定回答常用needn’t或dn’t have t，表示“不必”，而不用mustn’t。eg.—Must I cme back befre ten? —Yes，yu must.(N, yu needn’t.)3.表示有把握的推测，意为“一定、准是、想必”，只用于肯定句中。eg.It must be my mther.
1. Yu _______ be tired after the lng trip, aren’t yu?
2. Yu________be Carl. Yu haven’t changed a bit after all these years.3. It ________________________, fr the grund is wet this mrning.昨天晚上一定是下雨了，因为今早地面是湿的。
must have rained last night
基本用法：can&culdmay&mightmust
1. Rewrite the underlined sentences in the cnversatin using can/culd, may/might and must.
(At a fancy dress party)Chris: I spent ages putting up all the ballns and flwers last night.Jean: I expect yu are feeling tired nw!Chris: Yes, I am. Lk that guy is dressed as Batman. Is that Mike? Jean: It’s pssibly him. Check ut that girl ver there. I’m sure that’s Lucy. Chris: N, I dn’t think that’s Lucy. Lucy isn’t that tall.Jean: Lk at thse tw guys dressed as chickens! Oh, they’re waving at us! Maybe they’re frm ur schl.Chris: Let’s g and find ut.
Yu must feel tired nw!
It may/might/culd be him.
That must be Lucy!
that can’t be Lucy!
They may/might/culd be frm ur schl.
(1) If yu _______ smke, please g utside. A. can B. shuld C. must D. may(2)—I dn’t really like James. Why did yu invite him? — Dn’t wrry. He __________ cme. He said he wasn’t certain what his plans were. A. must ntB. need ntC. wuld ntD. might nt
2. Chse the best answers.
(3)The traffic is heavy these days. I arrive a bit late, s culd yu save me a place?A. can B. must C. need D. might(4)One f the few things yu ___ say abut English peple with certainty is that they talk a lt abut the weather.A. need B. must C. shuld D. can