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1、 Unit 13 We’re trying to save the earth! 一、教學(xué)目標(biāo)： 1. 語言知識(shí)目標(biāo) 基本詞匯：litter, advantage, bottom, fisherman, coal, ugly, cost, wooden, plastic, takeaway, bin, shark, fin, method, cruel. Harmful, chain, ecosystem, industry, law, scientific, afford, reusable, transportation, recycle, napkin, upside, gate

2、, bottle, president, inspiration, iron, work, metal, creativity, 基本詞組：be harmful to, at the top(of sth.), take part in, turn off, take action, throw away, put sth. to good use, pull… down, bring back 基本句型：We’re trying to save the earth! The river used to be so clean. The air

3、 is badly polluted. No scientific studies have showed that shark fins are good for health. We should help save the sharks. 2. 技能目標(biāo)： 能準(zhǔn)確使用現(xiàn)在實(shí)行時(shí)，現(xiàn)在完成時(shí)，被動(dòng)語態(tài)，情態(tài)動(dòng)詞和used to 句型。 3. 情感目標(biāo)： 有環(huán)境危機(jī)意識(shí)，學(xué)會(huì)注重環(huán)境保護(hù)環(huán)境。 二、教學(xué)重難點(diǎn)： 1. 教學(xué)重點(diǎn)：（1）能準(zhǔn)確使用現(xiàn)在實(shí)行時(shí)，現(xiàn)在完成時(shí)，被動(dòng)語態(tài)，情態(tài)動(dòng)詞和used to 句型。

4、（2）保護(hù)環(huán)境的措施方法。 2. 教學(xué)難點(diǎn)：能準(zhǔn)確使用現(xiàn)在實(shí)行時(shí)，現(xiàn)在完成時(shí)，被動(dòng)語態(tài)，情態(tài)動(dòng)詞和used to 句型。三、教學(xué)步驟： Section A 1 (1a-2d) I. Presentation Show the picture of the earth and tell students the earth is polluted now. For example： (1) The factories that burn coal pollute the air with a lot of black smoke. (2) Factories put waste i

5、nto the river. (3) People should throw away litter in the bin. (4)There are more cars on the road. II. Learning Here are some words related to different kinds of pollution. Write them in the box below. Then add more words. loud music cars rubbish planes littering s

6、hips factories smoking building houses mobile phones noise pollution air pollution water pollution ____________ ___________ _____________ ____________ ___________ _____________ ____________ ___________ _____________ ____________ ___________ __________

7、___ III. Listening 1. 1b Listen and complete the sentences. What was the problem? The river was _____________. Even the bottom (底部) of the river was full of ________. There were no more ______ for fishermen (漁民) to catch. What caused the problem? People are throwing _______ into the river. Fac

8、tories are putting ______ into the river. How should the problem be solved? We should write to the ____________ and ask them to ___________ the factories. Everyone should help to __________ the river. Keys: really dirty rubbish fish litter waste government close down clean

9、 up 2. Listen again and check (√) the sentences you hear. 1) We could go fishing in the river. 2) The river was really dirty. 3) The river has always been the nicest river in this town. 4) We should ask the teachers for help. Keys: 2 3 IV. Practice 1. Role-play the conversation in 1c. Mark

10、: The river was dirty. Even the bottom of the river was full of rubbish. Tony: But it used to be so clean! Mark: Yes, but people are throwing litter into the river. Tony: Everyone in this town should play a part in cleaning it up! 2. Make conversations using the pollution in 1a. A: The river ha

11、s always been the nicest river in this town. B: Yes, it used to be so clean. A: But I was there last weekend and the river was really dirty. B: What caused the problem? A: People are throwing litter into the river. B: What should we do? A: Factories are also putting waste into the river. B: Y

12、es, everyone in this town should play a part. A: We should write to the government and ask them to close down the factories. B: What else can we do? A: Everyone should help to clean up the river. V. Language points 1. We’re trying to save the earth! 我們正在竭盡全力拯救地球! try to do =try one’s best t

13、o do 努力去做某事。 e.g. Every student should try to study hard in order to study in a university. 2. Here are some words related to different kinds of pollution. be related to 與…有關(guān) e.g.?I am not?related?to?him in any way. 我和他無任何關(guān)系。 3. Everyone in this town should play a part in cleaning it up

14、! play a part in 在……方面起作用 e.g. A good diet plays a large part in helping people live longer. play a part 在……中扮演角色 e.g. He was invited to play a part in this TV play. 他被邀請(qǐng)參加這個(gè)電視劇的演出。 4. Even the bottom of the river was full of rubbish. Yes, but people are throwing litter into the

15、 river. litter 和 rubbish 都可指“垃圾”，用作不可數(shù)名詞。 rubbish 指“沒用的東西(被扔或?qū)⒁獊G棄的無用的東西)”不可回收。 litter 指“(室內(nèi)或公共場(chǎng)所)亂扔的廢物(紙屑、不要的包裝紙、廢瓶等)”還可回收 e.g. Throw the rubbish out. 把垃圾扔出去。 　　 The room is full of rubbish. 房間里堆滿了垃圾。 　　 Pick up your litter after a picnic. 野餐后將廢棄物收拾好。 VI. Listening 1. 2a Listen to the

16、 interview. Circle the kinds of pollution that Jason and Susan talk about. A. land pollution B. air pollution C. noise pollution D. water pollution Keys: B A 2. 2b Listen again and complete the sentences. 1) The air is badly polluted because there are ___________ on the roa

17、d these days. 2) Factories that burn coal also ________ the air with a lot of black smoke. 3) There is also too much rubbish and waste. People _________________ things every day. 4) People are also littering in ______________ like parks. This is turning beautiful places into ugly (丑陋) ones. Key

18、s: more cars pollute are throwing away public places 3. Listen and answer the questions. 1) Who is the interviewer talking to? 2) What are they talking? 3) What other problems do they see? Keys: Susan and Jason. The environmental problems. There’s too much rubbish and waste in the stree

19、ts. VII. Practice (2c) Use the information in 2a and 2b to role-play conversations between Jason and Susan. Jason: The air has become really polluted around here. I’m getting very worried. Susan: Yes, I used to be able to see stars in the sky. Jason: The problem is that… VIII. Discussion Ask

20、 students what we should do to save the earth. Help students answer, turn off the lights when you leave a room; stop riding in cars; stop using paper towels or napkins; recycle books and paper. IX. Reading 1. Read 2d and complete the chart. Problems Solving problems air pollution waste poll

21、ution wooden (木頭的) chopsticks or plastic forks rubbish 2. Role-play the conversation. Interviewer: Jason and Susan, what are your ideas for solving these problems? Jason: Well, to cut down air pollution, we should take the bus or subway instead of driving. Susan: Yeah, or ride a bike. Th

22、ere are other advantages (優(yōu)點(diǎn)) of bike riding. It’s good for health and it doesn’t cost (花費(fèi)) anything! Interviewer: Great ideas! What about waste pollution? Susan: Mmm, I think simple things like bringing a bag to go shopping can help. I started doing that a year ago. Jason: Me, too. Also, I never

23、 take wooden chopsticks or plastic (塑料) forks when I buy takeaway (外賣食品) food. I use the ones at home. Susan: And remember to throw rubbish in the bins and keep public places clean and beautiful for everyone. Interviewer: So together, our actions can make a difference and lead to a better future!

24、 X. Summary and language points 1. This is turning beautiful places into ugly ones. turn… into… 把……變成…… e.g. The icy rain seemed like to turn into snow. 漸漸地凍雨又變成雪花的模樣。 2. It’s good for health and it doesn’t cost anything! cost v. 花費(fèi)；使付出 指花費(fèi)金錢，主語通常是物。cost的過去式和過去分詞均為cost。 e.g. The

25、new shirt cost Mr Wang 200 yuan. 王先生花了200元買了新襯衫。 How much does the new computer cost? 新電腦花了多少錢？ take, spend, pay & cost take，spend，pay和cost都可以表示“花費(fèi)”，但它們的用法各有不同。 1) take多表示花費(fèi)時(shí)間，常用于It takes sb. some time to do sth.這一句型中，其中it作形式主語。 e.g. It usually takes me 40 minutes to cook the dinner.

26、2) spend多表示花費(fèi)時(shí)間和金錢，主語通常是人，常用于sb. spend(s) some time / money on sth.和sb. spend(s) some time / money (in) doing sth.兩種句型。 e.g. David spent 2,000 yuan on the new machine. My father spends an hour (in) watching the news on TV every day. 3) pay多表示花費(fèi)金錢，主語通常是人，常用于sb. pay(s) some money for sth.句

27、型。 e.g. Tommy paid 20 yuan for his breakfast yesterday. 4) cost多表示花費(fèi)金錢，主語通常是物，常用于sth. cost(s) (sb.) some money. 句型。 e.g. The new dress cost Linda 88 yuan. 根據(jù)句意用take, spend, pay或cost的適當(dāng)形式填空。 1) That new car ________?them lots of money. 2) Mona __________ 50 yuan on the books just now.

28、 3) It usually _______?me an hour to do my homework. 4) You should __________?some time practising your pronunciation. 5) My brother _______?6, 000 yuan for the new computer yesterday. Keys cost?? spent? takes spend paid 3. So together, our actions can make a difference and lead to a better

29、future! make a difference (to…) 表示(對(duì)……)產(chǎn)生影響或作用 e.g. Do you think his words would make any difference to the final decision? The new teacher always encourages little Tom. This has made a big difference to him. XI. Exercises 用動(dòng)詞的適當(dāng)形式填空。 1) We’re trying _______ (save) the earth. 2) There us

30、ed to_____ (be) clean and beautiful. 3) There are too many ______ for ________to catch (fish). 4) It’s bad for environment to use _________ (wood) chopsticks. Keys: to save be fish fishermen wooden XII. Think about The earth is badly polluted. Please make a poster and think of what we c

31、an do. XIII. Homework 1. Copy the new words and remember them. 2. Read the listening materials of 1b, 2a. 板書設(shè)計(jì) 教學(xué)反思 Section A 2 (3a-3c) I. Revision (1) Role-play 2d. (2) Translate these sentences into English. ①甚至是河底都滿是垃圾。 ②這個(gè)小鎮(zhèn)上的每個(gè)人都應(yīng)該參加打掃。 ③騎自行車有其它的優(yōu)點(diǎn)。 ④我買外賣

32、食品從來不拿木筷子和塑料叉子。 II. Lead in (1) Teacher tells students the earth is badly polluted. What should we do to save the earth? Let’s take action. For example: ①Turn off the lights when you leave a room; ②Take buses instead of driving cars ③Recycle books and paper. (2) There are some a

33、nimals are endangered. We should do something to protect the animals and the environment! III. Discussion (1) Have you ever seen a shark? (2) What do you know about sharks? IV. Reading (1) Sharks are endangered, read the passage and judge the sentences. ①Shark’s fin（魚鰭）soup is famous

34、 and expensive all around the world. ②We have to kill a whole shark to get a bowl of shark’s fin soup. ③People cut off sharks’ fins and throw the sharks back into the ocean. ④Sharks are in the bottom of the food chain in the ocean’s ecosystem. ⑤Wild Aid and the WWF are environmental protection g

35、roups in China. ⑥Shark’s fin s are good for health. (2) Complete the fact sheet in 3a. Where shark fin soup is popular ? Number of sharks caught and traded every year How much the numbers of some kinds of sharks have fallen in the last 20 to 30 years Two environmental groups which are

36、against “finning” V. Practice (3b) (1) Read the passage and dill in the blanks with the words in the box. 1. Many people do not realize they are killing a whole shark ______ they enjoy a bowl of shark fin soup. 2. Sharks are at the top of the food chain, ____ if their numbers drop, the oc

37、ean’s ecosystem will be in danger. 3. Many think that sharks are too strong to be endangered, _____ they are wrong. 4. _________ there are no scientific studies to support this, a lot of people believe that shark fins are good for health. 5. Sharks may disappear one day ___ we do not do something

38、 to stop the sale of shark fins. (2) Retell the passage according to the words below. shark’s fin soup, in southern China each time cut off no longer not only…but also… at the top drop be endangered the strongest around 70 million

39、 fallen by over 90 percent Wild Aid and the WWF develop laws scientific studies VI. Language points 1. A shark can no longer swim and slowly dies. 鯊魚不能再游泳然后慢慢死掉。 no longer意思是“不再” e.g. I’m no longer a student. 我不再是個(gè)學(xué)生了。 有兩個(gè)短語和no longer同義，即not…any longer和not…any more，但他們側(cè)重的方面不同。 no long

40、er和not…any longer側(cè)重時(shí)間。 e.g. He no longer lives here.= He doesn’t live here any longer. 他不在這兒居住了。(一個(gè)時(shí)間以前他住在這兒，過了這個(gè)時(shí)間，他就離開了。) not…any more側(cè)重側(cè)重程度和數(shù)量 e.g. You can drink no more. = You can’t drink any more. 你不能再喝了。(喝酒的量到了一定程度，不能再繼續(xù)下去了。) 2. This method is not only cruel, but also harm

41、ful to the environment. not only…but also… 用于連接兩個(gè)表示并列關(guān)系的成分，著重強(qiáng)調(diào)后者，其意為“不僅……而且……”; 其中的also有時(shí)可以省略。 e.g. 1) She not only plays well, but also writes music. 她不僅很會(huì)演奏，而且還會(huì)作曲。 2) Not only men but also women were chosen. 不僅僅是男的，女的也有被選中的。 若連接兩個(gè)成分作主語，其謂語通常與靠近的主語保持一致。 e.g. Not only you but also he

42、has to leave. 不只是你，他也得離開。 not only放在句首，后接句子時(shí)要用倒裝結(jié)構(gòu)。 e.g. Not only had the poor man been fined, but also he had been sent to prison. be harmful to 對(duì)… 有害 e.g. Smoking is harmful to the health. 吸煙有損健康。 Playing computer games much is harmful to students. 電腦游戲玩太多對(duì)學(xué)生有害。 3. Sharks are at the

43、top of the food chain in the ocean’s ecosystem. 鯊魚位于海洋生物系統(tǒng)食物鏈的頂部。 at the top of 在...最高地位; 用最高[最大]的(速度, 聲音等) e.g. I looked at the top of his head, his hair shiny and parted smoothly. He shouted at the top of his voice in order that he might be heard. 4. If their numbers drop too low, it

44、 will bring danger to all ocean life. 如果它們的數(shù)目降至過低，會(huì)給所有海洋生物帶來危險(xiǎn)。 此句復(fù)數(shù)形式的number表達(dá)全海洋中鯊魚的總量。當(dāng)表示數(shù)值的高或低時(shí)，number要用high或low修飾。 e.g. In that country, the number of children going to school is higher in cities than in towns and village.在那個(gè)國(guó)家，城市兒童入學(xué)人數(shù)比鄉(xiāng)鎮(zhèn)及農(nóng)村要高。 常與number搭配的動(dòng)詞有g(shù)row, fall等。 e.g. The numbe

45、r of families that own cars has been growing quickly recently. 5. Environment protection groups around the world, such as WildAid and the WWF, are teaching the public about “finning”. 1) 句中fin本為名詞，指 “魚鰭”。此句中的finning由動(dòng)詞化的fin（割鯊魚鰭以獲取魚翅）的-ing形式轉(zhuǎn)化而成，指課文中所陳述的 “獵翅”這一行為。 2) WildAid和WWF組織 WildAid（美國(guó)野生救

46、援協(xié)會(huì)）是保護(hù)野生動(dòng)物及棲息地環(huán)境的一個(gè)非盈利性的機(jī)構(gòu)，1999年注冊(cè)成立，其宗旨是保護(hù)及救助世界范圍內(nèi)的野生動(dòng)物；WWF（世界自然基金會(huì)）英文全稱為World Wide Fund for Nature，成立于1961年，是享有國(guó)際盛譽(yù)，全球最大的獨(dú)立性非政府環(huán)境保護(hù)組織之一。 VII. Homework Write 5 measures to protect the environment. 板書設(shè)計(jì) 教學(xué)反思 Section A 3 (Grammar Focus-4c) I. Revision 1. Check if y

47、ou know these phrases. ① 不同種類的污染 ② 河底 ③ 把垃圾扔到河里 ④ 在…中起作用 ⑤ 在中國(guó)南部 ⑥ 對(duì)……有害 ⑦ 在……頂部 ⑧ 海洋生態(tài)系統(tǒng) 2. Translate these sentences into English. ① 甚至是河底都滿是垃圾。 ② 這個(gè)方法不僅殘酷還對(duì)環(huán)境有害。 ③ 鯊魚處于海洋食物鏈的頂部。 ④ 許多人相信魚翅對(duì)健康有好處。 II. Grammar Focus Pay attention to the

48、sentences. 1) We’re trying to save the earth. 2) The river used to be so clean. 3) The air is badly polluted. 4) No scientific studies have shown that shark fins are good for health. 5) We should help save the sharks. 1. 現(xiàn)在進(jìn)行時(shí): Present Progressive 定義：表示說話時(shí)（瞬間）正在進(jìn)行的動(dòng)作，也表示目前或現(xiàn)階段一直進(jìn)行的動(dòng)作。 結(jié)構(gòu): b

49、e (am/is/ are) + v.-ing 標(biāo)志詞：Look, Listen, now, right now… e.g. Look! The boy is crying. 2. used to do與be used to doing used to do sth. 表示過去常常做某事, 而現(xiàn)在往往不做了, 后接動(dòng)詞原形。 be used to doing sth. 表示習(xí)慣于做某事。 e.g. I used to get up at six o’clock. Joe is used to drinking a cup of coffee every morning.

50、 3. 被動(dòng)語態(tài)：Passive voice 定義：表示主語是動(dòng)作的承受者，即行為動(dòng)作的對(duì)象的一種語態(tài)。 結(jié)構(gòu)：be + 過去分詞 e.g. A new school was built last year. Our classroom is cleaned every day. 4. 現(xiàn)在完成時(shí): Present Perfect 定義：表示動(dòng)作已經(jīng)完成, 但對(duì)現(xiàn)在造成影響; 或者表示從過去某一時(shí)間開始一直延續(xù)到現(xiàn)在并還可能持續(xù)下去的動(dòng)作。 結(jié)構(gòu): has/have + 過去分詞 標(biāo)志詞：already, yet, ever, never, since, f

51、or… e.g. I haven’t finished my homework yet. 5. 情態(tài)動(dòng)詞 1) 情態(tài)動(dòng)詞本身有一定的詞義，表示說話人的情緒、態(tài)度或語氣，但不能單獨(dú)作謂語，只能與其他動(dòng)詞構(gòu)成謂語。常見的有：can (could), may (might), must, need, shall (should), will (would)等。 2) 情態(tài)動(dòng)詞無人稱和數(shù)的變化, 后接動(dòng)詞原形。否定式是在情態(tài)動(dòng)詞后面加not。個(gè)別情態(tài)動(dòng)詞有過去式形式, 可用來表達(dá)更加客氣、委婉的語氣。 e.g. Ken can climb up the tress like a ko

52、ala. Tracy could ride a bicycle when she was five years old. You mustn’t play with fire. It is dangerous. III. Practice 1. Work on 4a. Fill in the blanks with the correct forms of the verbs in brackets. Joe: _____ you ever ______ (take) part in an environmental project ? Eric:

53、 Yes, I have. I ______ (help) with a Clean-Up Day last year. It was _________ (consider) the biggest clean-up project this city ____ ever ____ (have). Joe: How many people ____ (take) part? Eric: I _______ (think) more than 1,000 people ______ (come) to help out. Joe: That’s fantastic! I guess

54、 everyone in this city is ______ (try) to improve the environment. Eric: Yes, we can’t afford to ____ (wait) any longer to take action! Learn some new words and expressions. 2. Work on 4b. Fill in the blanks with the appropriate modal verbs from the box. The words are: can, would, could,

55、 have to, should, must, may/might 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 in

56、stead of plastic bags. I think it’s 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 it’s far, you __________ take the bus. All these small things ______ add up and become big things that ______

57、improve the environment. Let’s take action now! Learn some new words and expressions. 3. Work on 4c. Make a list of things that people can do to help the environment and discuss your list with your partner. use public transportation (n.交通運(yùn)輸); turn off the lights when you leave a room; use r

58、eusable bags instead of plastic bags; ride your bike or walk to school or work; stop using paper napkins; recycle books and paper … 4. Discussion. A: I think that everyone should use public transportation. B: I disagree. It’s difficult for parents with young children to use public transporta

59、tion… IV. Language points 1. We can’t afford to wait any longer to take action! afford v. 承擔(dān)得起；提供, 給予 afford to do sth. (常與can, be ble to連用) 買得起；有足夠的…… e.g. We can’t afford to pay such a price. 我們付不起這個(gè)價(jià)錢。 Dancing affords us pleasure. 跳舞給我們帶來快樂。 2. …save electricity by turning of

60、f the lights when you leave a room. turning off 關(guān)掉 e.g. Please turn the television off before you go to bed. 睡覺前請(qǐng)關(guān)掉電視。 拓展：turn相關(guān)短語 turn around 轉(zhuǎn)身 turn up 調(diào)高（音量） turn down 調(diào)低；拒絕 turn into 變成；進(jìn)入 turn on 打開，發(fā)動(dòng) turn off 關(guān)掉，關(guān)閉 turn out to be 結(jié)果是 turn over

61、 移交 V. Homework Finish the exercises in the workbook. 板書設(shè)計(jì) 教學(xué)反思 Section B 1 (1a—2e) I. Revision Role-play this conversation. A: I think that everyone should use public transportation. B: I disagree. It’s difficult for parents with young children

62、to use public transportation… A: But we can do other things. For example, we can go to school on foot. B: You are right. We should turn off the lights when we leave the room. II. Leading in (1) Tell students we should do these things to protect the environment. Turn off th

63、e lights when you leave a room; Stop riding in cars; Stopping using paper towels or napkins; Recycle books and paper. Turn off the shower while you are washing your hair. You can help reduce pollution by putting that soda can in a different bin. Don’t use paper napkins. (2)What can w

64、e do to help save the earth? Rank these items from the easiest (1) to the most difficult(5). (1a) ______stop riding in cars ______recycle books and paper ______turn off the lights when you leave a room ______turn off the shower while you are washing your hair ______don’t use paper n

65、apkins (3) Compare your answers in 1a with your partner. III. Listening 1c&1d (1) Listen and check (√ ) the things that Julia and Jack talk about. (2) Check ( ) the things that Julia is doing now, the things she will do in the future and the things she would never do. (3) Check the answer

66、s with the whole class. Things Julia and Jack talk about Things Julia is doing now Things Julia will do in the future Things Julia would never do ___ turning off the light ? ? ? ___ turning off the shower ? ? ? ___ stopping using paper napkins ? ? ? ___ taking your own bags when shopping. ? ? ? ___ not riding in cars ? ? ? ___ riding a bike ? ? ? ___ recycling paper ? ? ? (4) Listen again and answer the questions below. ①Who read a book? ②Would Julia turn