英语人教版九年级全册Unit13 Grammar Focus-4c.ppt

1、Unit 13 We are trying to save the earth.,Section A Grammar Focus-4c,永盛中学 牟英,What are you doing now?,We are having an English class.,How long have you learned English?,We have learned English for almost 3 years.,Questions,阅读Grammar Focus表格内的句子，思考以下问题：,1.时态 现在进行时态：什么时候使用现在进行时态？ 现在进行时的结构是什么？ 现在进行时的标志词有

2、哪些？ 现在分词的构成规则有哪些？ 现在完成时：现在完成时态的用法有哪些？ 现在完成时的结构是什么？ 现在完成时的标志词有哪些？ 过去分词的构成规则有哪些？,1）现在进行时： Now people are taking action to save the sharks. Look! Kenny is swimming in the pool. Listen carefully please. I am talking about something very important. Be quiet please.The baby is sleeping.,A.现在进行时表示（说话瞬间）正在进

3、行或发生的动作，也可表示当前一段时间内的活动或现阶段正在进行的动作。,B.构成：be(am/is/are)+v.ing(动词现在分词）,C.标志性词汇：now,right now,look,listen,D.现在分词的构成：,a.一般情况在动词词尾加-ing。如：gogoing，workworking。,b.以不发音的e结尾的动词，去e加-ing。如：havehaving,makemaking。,c.以一个辅音字母结尾的重读闭音节，双写末尾一个字母再加-ing。如：stopstopping,cutcutting。,现在完成时态： He has kept this book for two ye

4、ars. We have lived here since I went to junior high school. Have you ever been to Beijing? H has already tried his best to solve the problem,but it didnt work.,A.现在完成时的用法:表示动作已经完成,但对现在造成影响或结果;或者表示从过去某一时间开始一直延续到现在并还可能延续下去的动作.,B.结构:have/has+过去分词。,C.标志词：already,yet,ever,never,before,once,twice,recently

5、,so far,for+时间段，since+时间点/从句,D.过去分词构成规则：,a.一般情况在动词后加-ed。如: workworked,cleancleaned,b.在以e结尾的词后加-d。如：closeclosed,livelived。,c.以辅音字母加y结尾的词，变y为i再加-ed。如：studystudied,trytried。,d.重读闭音节词，双写末尾的辅音字母再加-ed。如：stopstopped,begbegged。,e.不规则动词的过去分词：,AAA型 put put put,AAB型 beat beat beaten,ABA型 become became become,A

6、BB型 build built built,ABC型 do did done,2.语态,English is spoken by many people. The telepone was invented by Bell in 1876. In the future,robots will be used by more and more people. Your room must be cleaned every day.,A.主动语态表示主语是动作的执行者；被动语态表示主语是动作的承受者，即行为动作的对象。,B.构成：be+过去分词,C.一般现在时：am/is/are+过去分词 一般过

7、去时：was/were+过去分词 一般将来时：will be/is going to be+过去分词 情态动词的被动语态：情态动词+be+过去分词,2） 被动语态： 主动语态和被动语态有什么区别？ 被动语态的构成是什么？ 一般现在时一般过去时一般将来时和情态动词的被动语态的结构 分别是什么？,3.情态动词 Jim can play basketball. My sister could ride a bike when she was 5 years old. You must finish your homework on time. Its raining outside,I have t

8、o take an umbrella with me. As student ,we should obey the school rules. Would you please give me a hand? The light is on in the room,someone may be there.,情态动词： 情态动词有无人称和数的变化？ 情态动词后接动词的什么形式？ 你知道哪些情态动词？各表示什么意思？,无人称和数的变化,动词原形,can/could能够；may/might可能、可以；must必须；have to不得不； would愿意、将要；should应该；need需要；sh

9、all将（第一人称）,4.used to： Jack used to get up late,but he gets up very early now. She didnt use to like tests. Did Tina use to live in Shanghai when she was a child?,used to表示什么意思？后接什么？ 它的否定句和一般疑问句的形式是什么？ 它和be used to的区别是什么？,过去常常做某事，后接动词原形,否定形式：didnt use to,used not to(usednt to),一般疑问句：Did+主语+use to.? U

10、sed +主语+to.?,used to do表示过去常常做某事，现在不做了； be used to doing表示习惯于做某事,用括号里所给动词的正确形式填空,1. Look,the girls _(dance) in the classroom. 2. Its 5 oclock now. Mike _ (have)dinner. 3. -_ you ever _ (be) to the US? - Yes, twice. 4. - May I speak to John? - Sorry, he _(go) to New York. He will be back in two days.

11、 5. -Did you go to Jacks birthday? - No,I _(not invite).,are dancing,is having,Have,been,has gone,wasnt invited,6. -Do you know Mr.White well? - Yes. He _(work) for the WWF for two years. 7. I _ (live) here since 1990. 8. - Do you often clean your classroom? - Yes. Our classroom _(clean) every day.

12、9.- Whats this? -Its a CD. This CD _(use) for learning English. 10. A new highway in my hometown _ (bulid) next month.,has worked,have lived,is cleaned,is used,will be built,情态动词练习,1.- _ you pass me a pen? Id like to write down the phone number. - Sure. Here it is. A.Can B.Need C.Might D.Must 2. - M

13、ay I go to the cinema, Mum? - Certainly, but you _ be back by 11 oclock. A.can B.may C.must D. need 3. You _ worry about me. Its nothing serious. A.cant B.mustnt C. neednt D. wont,4. - Excause me. Is this the right way to the Summer Palace? - Sorry, Im not sure. but it _ be. A.might B.mustnt C.cant

14、D.must 5. The man in the office _ be Mr.Black, because he went home just now. A.musnt B.may not C.cant D.neednt,use to 练习,A 她过去常常周末和朋友闲逛。 She _ with friends on weekds. B 他习惯于每晚睡得很晚。 He _ at night. C. Ken used to be afraid of dogs.(改为一般疑问句) _?,used to hang out,is used to sleeping late/ staying up,Did

15、 Ken use to be afraid of dogs,Joe: _you ever _ (take) part in an environmental project? Ken: Yes, I have. I _ (help) with a Clean-Up Day last year. It was_(consider) the biggest clean-up project this city_ ever _(have).,Fill in the blanks with the correct forms of the verbs in brackets.,4a,Have take

16、n,helped,considered,had,_,had,Joe: How many people _ (take) part? Ken: I _ (think) more than 1,000 people _(come) to help out. Joe: Thats fantastic! I guess everyone in this city is _ (try) to improve the environment. Ken: Yes, we cant affort to _ (wait) any longer to take action!,took,think,came,tr

17、ying,wait,Read the passage in 4b and check the main idea of the passage: A.People can do big things to save the earth.( ) B.Saving the earth begins with small things.( ) C.Plastic bags should be forbidden in stores.( ),Fill in the blanks with the appropriate modal verbs from the box.,People _ think

18、that big things _ be done to save the earth. Many forget that saving the earth begins with small things. For example, you _ save electricity by turning off the lights when you leave a room. You _ also use reusable bags instead of plastic bags.,4b,may/might,should/can/could,can/couldshould,can/could/should,I think its a great idea that you now _pay for plastic bags in some stores. And instead of driving to school or wor