初中三年级英语Unit13SectionA-2.ppt

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1、Unit 13We are trying to save the earth. We are try 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 Focu

2、sJoe: _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 helpedconsideredhad hadJoe: H

3、ow 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 afford any longer to _ (wait) to take action!tookthinkcametryingwait Fill in the blanks with the approp

4、riate modal verbs from the box. People _ think 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. 4b4bcan w

5、ould could have to should must may/mightmaymustcouldcouldI think its a great idea that you now _ pay for plastic bags in some stores. And instead of driving to school or work, you _ ride your bike or walk. If its far, you take the bus. All these small things _ add up and become good things that _ im

6、prove the environment. Lets take action now! have tocancouldcan Make a list fo thingsthat people can do to help the environment and discuss your list with your partner.4 4c cA: I think that everyone should use public transportation.B: I disagree. its diffcult for parents with young children to use p

7、ublic transportation.use public transportation. Discussing.use public transportationtake your own shopping bags when go shoppingreduce the use of air conditioners in summerturn off the lights when you leave the roomgrow more plants.A: I think that everyone should take your own shopping bags when go

8、shopping.B: I agree. its good for the environment. A: I think that everyone should reduce the use of air conditioners in summer.B: I disagree. the summer is so hot, especially in sourth China. Without air-conditioners, people may not have the patience to work.A: I think that everyone should turn off

9、 the lights when you leave the room.B: I agree. its good to save energy resources.A: I think that everyone should use public transportation.B: I disagree. its diffcult for parents with young children to use public transportation.A: I think that everyone should grow more plants.B: I agree. growing mo

10、re plants will provide us more fresh air and make our plant more beautiful. 现在进行时现在进行时（1）含义：表示正在发生或进行的动作。）含义：表示正在发生或进行的动作。（2）基本结构：）基本结构：主语主语 + be + 现在分词（现在分词（be 的形式随主语的变化的形式随主语的变化而变化）而变化）（3）基本用法：）基本用法：表示现在正在进行的动作。特征：常常与表示现在正在进行的动作。特征：常常与now或具或具体的时间连用，有时句中会有感官动词来提示，或通过体的时间连用，有时句中会有感官动词来提示，或通过上下文来暗示。上

11、下文来暗示。表示现阶段一直进行的动作。这类动词常常是延续表示现阶段一直进行的动作。这类动词常常是延续性动词。常于性动词。常于at present, this week, these days等连用。等连用。表示主语的特征、性格、能力等表示主语的特征、性格、能力等本单元复习现在进行时、本单元复习现在进行时、used to句型、被动语态、句型、被动语态、现在完成时和情态动词。现在完成时和情态动词。现在完成时现在完成时（1）含义：表示过去发生的动作对现在还有影）含义：表示过去发生的动作对现在还有影响。响。（2）基本结构：）基本结构：主语主语 + have / has + 过去分词过去分词（3）基本用

12、法：）基本用法：表示过去发生的动作，但强调对现在产生影响。表示过去发生的动作，但强调对现在产生影响。特征：不能与表示具体的时间状语连用。特征：不能与表示具体的时间状语连用。表示过去发生的动作或存在的状态一直延续到表示过去发生的动作或存在的状态一直延续到现在，还可能继续下去。常常与现在，还可能继续下去。常常与since, for, in the past + 时间名词，时间名词，in the last +时间名词等时间状时间名词等时间状语连用，而且谓语动词要求是延续性动词。语连用，而且谓语动词要求是延续性动词。表示一种表示一种“经历或体验经历或体验”，即可以表示经历过，即可以表示经历过也可以是从

13、来都没有经历过。也可以是从来都没有经历过。被动语态被动语态初中阶段我们学习了七种被动结构，归纳如下：初中阶段我们学习了七种被动结构，归纳如下：（1）一般现在时是被动语态：）一般现在时是被动语态：am / is / 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

14、 / 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 going 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，如认为情态动词表示说话人对某一动作或状态的态度，如认为“可能可能”、“应当应当”、“必要必要”等。情态动词本身有一等。情态动词本身有一定的意义，但不能单独作谓语，也没有人称和数的变

15、化。定的意义，但不能单独作谓语，也没有人称和数的变化。后面一般跟动词原形。后面一般跟动词原形。used 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”，指的是过去的习惯性，指的是过去的习惯性动作，目的在于与现在形成对照。动作，目的在于与现在形成对照。used to是个情态动词，是个情态动词，其中的其中的to是不定式符号，后面跟动词原形。在美式英语是不定式符号，后面跟动词原形。在美式英语中。它的疑问式是：中。它的疑问式是：Did 主语主语use to do sth？否定？否定式是：主语式是：主语didnt use。在英式英语中，它的疑问。在英式英语中，它的疑问式应当是：式应

16、当是：Used 主语主语to sth？否定式应当是？否定式应当是used not to或或use（d）nt to。He used to stay up late. 他过去常熬到很晚。他过去常熬到很晚。used 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

17、：主语否定式是：主语didnt use在英式英语中在英式英语中： 它的疑问式应当是：它的疑问式应当是：Used 主语主语to sth否定式应当是否定式应当是used not to.I. 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 _ (plant) on the hill every year. 5. He _ (live)

18、here for 20 years. to be clean is sleeping are planted has livedII.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 now.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 i

19、n two days.5. -Did you go to Jacks birthday? - No,I _(not invite).is dancingis havingHave beenhas gonewas not invited6. -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 da

20、y.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 cleanedis used will be built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. -

21、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 nothing 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.mught B.mustnt C.cant D

22、.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逛。她过去常常周末和朋友闲逛。She _ with friends on weekends.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.(改为一般疑问改为一般疑问句句)_?used to hang outis used to slee

23、ping late/ staying upDid Ken use to be afraid of dogs1. He promised to pick me up at the school gate. However, he _ yet. A. didnt arrive B. 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 rega

24、rding 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, Dad? 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 dri

25、nking ; 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 light. 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. use

26、d 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 ou

27、t 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 our 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Homework Write an article to show in what way we students can protect the environment.