《We're trying to save the earth!》PPT课件精选.ppt

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1、Unit 13We are trying to save the earth. We are trying to save the earth.Present progressiveThe river used to be so clean.used to The air is badly polluted.Passive voiceNo scientific studies have shown that sharks fins are good for health.Present perferctWe should save the sharks.Model verbsGrammar F

2、ocusJoe: _ 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.4a4aHave taken helpedconsidered had ha

3、dJoe: 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!tookthinkcametryingwait1) 时态：时态：现在进行时：什么时候使用？现在进行时：

4、什么时候使用？ 结构是什么？结构是什么？ 标志性词语有哪些？标志性词语有哪些？ 现在分词的构成规则？现在分词的构成规则？现在完成时：什么时候用？现在完成时：什么时候用？ 结构是什么？结构是什么？ 标志性词汇有哪些？标志性词汇有哪些？ 过去分词的构成规则？过去分词的构成规则？现在进行时现在进行时（1）含义：表示现在正在进行的动作。）含义：表示现在正在进行的动作。 表示现阶段一直进行的动作。表示现阶段一直进行的动作。 （2）基本结构：）基本结构： am/ is/are + 现在分词现在分词（3）标志词：）标志词：now, right now, Look, Listen at present, th

5、is week, these days（4）现在分词的构成：）现在分词的构成：一般情况下在动词词尾加一般情况下在动词词尾加-ing。如：。如：go-going。以不发音的字母以不发音的字母e结尾的动词，去掉结尾的动词，去掉e加加-ing。如：如： have-having。以一个辅音字母结尾的重读闭音节，双写最后以一个辅音字母结尾的重读闭音节，双写最后一个字一个字 母，再加母，再加-ing。如：。如：stop-stopping。现在完成时现在完成时（1）含义：）含义：表示过去发生的动作，对现在造成的影响。表示过去发生的动作，对现在造成的影响。表示过去发生的动作或存在的状态一直延表示过去发生的动作

6、或存在的状态一直延续到现在，还可能继续下去。续到现在，还可能继续下去。（2）基本结构：）基本结构：have / has + 过去分词过去分词（3）标志词：标志词：already, yet, ever, never, once, twice, recently, so far, for+时间段时间段, since+时间点时间点/从句，从句，in the past + 时间名词，时间名词， in the last +时间名词时间名词。（4）过去分词的构成：）过去分词的构成：一般情况下在动词词尾加一般情况下在动词词尾加-ed。如：。如：work-worked。以以e结尾的动词后只加结尾的动词后只加-

7、d。如：。如：close-closed。以辅音字母以辅音字母+y结尾的动词，应将结尾的动词，应将y改为改为i再加再加ed。如：如：study-studied。以重读闭音节结尾的动词，要双写末尾的辅音以重读闭音节结尾的动词，要双写末尾的辅音字母再加字母再加-ed。如：。如：stop-stopped。不规则动词的过去分词：不规则动词的过去分词：AAA型；型；AAB型；型；ABA型；型；ABB型；型；ABC型。型。 2) 语态：语态：被动语态：与主动语态区别？被动语态：与主动语态区别？ 构成是什么？构成是什么？一般现在时、一般过去时、一般将来时和一般现在时、一般过去时、一般将来时和情态动词的被动语态

8、的结构分别是什么？情态动词的被动语态的结构分别是什么？3) 情态动词：有无人称和数的变化？情态动词：有无人称和数的变化？ 后接动词的什么形式？后接动词的什么形式？ 情态动词有哪些？各表示什么意思？情态动词有哪些？各表示什么意思？4) used to 表示什么意思？后接什么？否表示什么意思？后接什么？否定句和一般疑问句的形式是什么？定句和一般疑问句的形式是什么？ used to 和和 be used to 的区别是什么？的区别是什么？被动语态被动语态初中阶段我们学习了初中阶段我们学习了8种被动结构，归纳如下：种被动结构，归纳如下：（1）一般现在时的被动式：）一般现在时的被动式：am / is /

9、 are + 过去分词过去分词（2）现在完成时的被动式：）现在完成时的被动式： have / has + been + 过去分词过去分词（3）现在进行时的被动式：）现在进行时的被动式：am/ is/ are + being + 过去分词过去分词（4）一般过去时的被动式：）一般过去时的被动式：was / were + 过去分词过去分词（5）过去进行时的被动式：）过去进行时的被动式：was / were + being + 过去分词过去分词（6）过去完成时的被动式：）过去完成时的被动式：had + been + 过去分词过去分词（7）一般将来时的被动式：）一般将来时的被动式：will / be g

10、oing to be+ 过去分词过去分词（8）含有情态动词的被动式：）含有情态动词的被动式：情态动词情态动词+be +动词的过去分词。动词的过去分词。情态动词情态动词情态动词表示说话人对某一动作或状态的态度，情态动词表示说话人对某一动作或状态的态度，如认为如认为“可能可能”、“应当应当”、“必要必要”等。等。 can/could能够；能够； may/might可能、可以；可能、可以； would愿意、将要；愿意、将要； shall将（第一人称）；将（第一人称）； should应该；应该； must必须必须 need需要；需要； have to 不得不；不得不；情态动词还可以表示推测：情态动词还

11、可以表示推测： 肯定推测，肯定推测， 不定推测，不定推测， 否定推测否定推测情态动词练习情态动词练习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.Must2. - May I go to the cinema, Mum? - Certainly, but you _ be back by 11 oclock. A.can B.may C.must D. need3. you _ worry about me. Its noth

12、ing serious. A.cant B.mustnt C. neednt D. wont4. - Excause me. Is this the right way to the Summer Palace? - Sorry, Im not sure. but it _ be. A.might B.mustnt C.cant D.must5. The man in the office _ be Mr.Black, because he went home just now. A.musnt B.may not C.cant D.needntuse to 练习练习A 她过去常常周末和朋友闲

13、逛。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。他习惯于每晚睡得很晚。 He _ at night.C. Ken used to be afraid of dogs.(改为一般疑改为一般疑问句问句)_? used to hang outis used to sleeping late/ staying upDid Ken use to be afraid of dogsused to 结构结构used to意为意为“过去常常做某事过去常常做某事”，指的是过去，指的是过去的习惯性动作，目的在于与现在形成对照。的习惯性动作，目的在于

14、与现在形成对照。used to是个情态动词，其中的是个情态动词，其中的to是不定式符号，是不定式符号，后面跟动词原形。后面跟动词原形。在美式英语中在美式英语中：它的疑问式是：它的疑问式是：Did 主语主语use to do sth否定式是：主语否定式是：主语didnt useI. 用所给词的适当形式填空。用所给词的适当形式填空。1. The old man used _ (be) a teacher. 2. We should _ (clean) the room every day. 3. Look! Tom _ (sleep) in his room. 4. Lots of trees _

15、 (plant) on the hill every year. 5. He _ (live) here for 20 years. to be clean is sleeping are planted has lived用括号里所给动词的正确形式填空用括号里所给动词的正确形式填空1. The girl _(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

16、, he _(go) to New York. he will be back in two days.5. -Did you go to Jacks birthday? - No,I _(not invite).is dancingis havingHave beenhas gonewas not invited5. -Do you know Mr.White well? - Yes. He _(work) for the WWF for two years.6. I _ (live) here since 1990.7. - Do you often clean your classroo

17、m? - Yes. Our classroom _(clean) every day.9.- Whats this? -Its a CD. This CD _(use) for learning English.10. Anew highway in my hometown _ (bulid) next month. has worked have lived is cleaned is used will be built1. He promised to pick me up at the school gate. However, he _ yet. A. didnt arrive B.

18、 doesnt arrive C. isnt arriving D. hasnt arrived2. Ba Jin, one of the greatest writers in China, _ as “Peoples Writer”. A. is regarded B. has regarded C. is regarding D. regardsChoose the best answer.3. Where is Tom? He _ in his room. A. is readingB. readsC. readD. was reading 4. May I go out now, D

19、ad? No. You _ let your mother know first. A. can B. may C. need D. must5. Her son _ Coke, but now he _ milk.A. used to drink ; is used to drinking B. used to drinking ; drinksC. is used to drinking ; used to drink D. is used to drink ; is drinking1. (2013江苏淮安江苏淮安) Its getting dark. Please _ the ligh

20、t. A. turn on B. turn off C. turn down D. turn around2. (2013湖北随州湖北随州)How does Jack usually go to work?He _ drive a car, but now he _ there to lose weight.A. used to; is used to walk B. was used to; is used to walkingC. was used to; is used to walk D. used to; is used to walking感悟中考感悟中考3. (2013山东枣庄山

21、东枣庄) In the last ten month, September Miracle(奇迹奇迹)_on CCTV for more than five times and is popular all over the country. A. has played the piano B. has given out their song disks C .has written songs D. has performed4. (2013广东广东) Not only my friends but also I_ interested in football and Messi is o

22、ur favorite star.A. be B. am C. is D. are5. (2013湖北宜昌湖北宜昌)At present, one of the best ways to study is working in groups. More chances _ to students to learn from each other. A. offer B. are offered C. have offered D. are offering 感悟中考感悟中考 Fill in the blanks with the appropriate modal verbs from the

23、 box. People _ think that big things _ be done. However, 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 paper or reusable bags instead of plastic bags. 4b4bcan could would have to should must may/mightmayshouldcouldwouldHomework 1.write an article to show in what way we students can protect the environment.