Unit13Wearetryingtosavetheearth!教案

1、Unit 13 Were trying to save the earth!一、教學(xué)目標(biāo)：1. 語言知識目標(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, bottle,

2、 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：Were trying to save the earth! The river used to be so clean. The air is badly polluted. No scientific stu

3、dies have showed that shark fins are good for health. We should help save the sharks. 2. 技能目標(biāo): 能正確運(yùn)用現(xiàn)在進(jìn)行時，現(xiàn)在完成時，被動語態(tài)，情態(tài)動詞和used to 句型。3. 情感目標(biāo): 有環(huán)境危機(jī)意識，學(xué)會關(guān)注環(huán)境保護(hù)環(huán)境。二、教學(xué)重難點(diǎn)： 1. 教學(xué)重點(diǎn)：（1）能正確運(yùn)用現(xiàn)在進(jìn)行時，現(xiàn)在完成時，被動語態(tài)，情態(tài)動詞和used to 句型。 （2）保護(hù)環(huán)境的措施方法。2. 教學(xué)難點(diǎn)：能正確運(yùn)用現(xiàn)在進(jìn)行時，現(xiàn)在完成時，被動語態(tài)，情態(tài)動詞和used to 句型。三、教學(xué)步驟:Section A 1 (1

4、a-2d)I. PresentationShow 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 into the river.(3) People should throw away litter in the bin. (4)There are more cars on the

5、road.II. LearningHere 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 ships factories smoking building houses mobile phonesnoise pollution air pollution water pollution _ _ _ _ _ _ _ _ _Keys : nois

6、e pollution loud music planes mobile phones building housesair pollution factories smoking cars building houseswater pollution ships rubbish littering factoriesIII. Listening1. 1b Listen and complete the sentences.What was the problem?The river was _. Even the bottom (底部) of the river was full of _.

7、 There were no more _ for fishermen (漁民) to catch.What caused the problem?People are throwing _ into the river. Factories 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 rub

8、bish fish litter waste governmentclose down clean up2. 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. Practice1. Role-pl

9、ay the conversation in 1c.Mark: 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 i

10、n 1a.A: The river has 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 rive

11、r.B: Yes, 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 points1. Were trying to save the earth! 我們正在竭盡全力拯救地球! try to do =try ones best to do 努力去做某

12、事。 e.g. Every student should try to study hard in order to study in a university. 為了進(jìn)入大學(xué)學(xué)習(xí)，每個學(xué)生都應(yīng)該努力學(xué)習(xí)。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

13、in cleaning it up! play a part in 在方面起作用 e.g. A good diet plays a large part in helping people live longer. 健康的飲食在幫助人們長壽方面起著非常大的作用。play a part 在中扮演角色 e.g. He was invited to play a part in this TV play. 他被邀請參加這個電視劇的演出。4. Even the bottom of the river was full of rubbish. Yes, but people are throwing l

14、itter into the 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. Listening1. 2a Listen to the interview.

15、Circle the kinds of pollution that Jason and Susan talk about.A. land pollution B. air pollutionC. noise pollution D. water pollutionKeys: B A2. 2b Listen again and complete the sentences.1) The air is badly polluted because there are _ on the road these days.2) Factories that burn coal also _ the a

16、ir 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. Keys: more cars pollute are throwing away public places3. Listen and answer the questions.1) Who is

17、the interviewer talking to?2) What are they talking?3) What other problems do they see?Keys: Susan and Jason.The environmental problems.Theres too much rubbish and waste in the streets.VII. Practice (2c)Use the information in 2a and 2b to role-play conversations between Jason and Susan.Jason: The ai

18、r has become really polluted around here. Im getting very worried.Susan: Yes, I used to be able to see stars in the sky.Jason: The problem is that VIII. DiscussionAsk students what we should do to save the earth. Help students answer, turn off thelights when you leave a room; stop riding in cars; st

19、op using paper towels or napkins; recycle books and paper.IX. Reading1. Read 2d and complete the chart.ProblemsSolving problemsair pollutionwaste pollutionwooden (木頭的) chopsticks or plastic forksrubbish2. Role-play the conversation.Interviewer: Jason and Susan, what are your ideas for solving these

20、problems?Jason: Well, to cut down air pollution, we should take the bus or subway instead of driving.Susan: Yeah, or ride a bike. There are other advantages (優(yōu)點(diǎn)) of bike riding. Its good for health and it doesnt cost (花費(fèi)) anything!Interviewer: Great ideas! What about waste pollution?Susan: Mmm, I th

21、ink simple things like bringing a bag to go shopping can help. I started doing that a year ago.Jason: Me, too. Also, I never 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 cl

22、ean and beautiful for everyone.Interviewer: So together, our actions can make a difference and lead to a better future!X. Summary and language points1. 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. Its good for health

23、 and it doesnt 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 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 & costtake，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)時間，常用于It takes sb. some time to do sth

24、.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.2) spend多表示花費(fèi)時間和金錢，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

25、 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 _ 5

26、0 yuan on the books just now.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 paid3. So together, our actions can make a differe

27、nce and lead to a better future! make a difference (to) 表示(對)產(chǎn)生影響或作用 e.g. Do you think his words would make any difference to the final decision? 你認(rèn)為他的話會對最后的決定產(chǎn)生影響嗎？ The new teacher always encourages little Tom. This has made a big difference to him.新來的老師總是鼓勵小湯姆，這對他影響很大。XI. Exercises用動詞的適當(dāng)形式填空。1) We

28、re trying _ (save) the earth.2) There used to_ (be) clean and beautiful.3) There are too many _ for _to catch (fish).4) Its bad for environment to use _ (wood) chopsticks.Keys: to save be fish fishermen woodenXII. Think aboutThe earth is badly polluted. Please make a poster and think of what we can

29、do.XIII. Homework1. Copy the new words and remember them. 2. Read the listening materials of 1b, 2a.Section A 2 (3a-3c)I. Revision(1) Role-play 2d.(2) Translate these sentences into English.甚至是河底都滿是垃圾。這個小鎮(zhèn)上的每個人都應(yīng)該參加打掃。騎自行車有其它的優(yōu)點(diǎn)。我買外賣食品從來不拿木筷子和塑料叉子。II. Lead in (1) Teacher tells students the earth is

30、badly polluted. What should we do to save the earth? Lets take action. For example: Turn off the lights when you leave a room; Take buses instead of driving carsRecycle books and paper.(2) There are some animals are endangered. We should do something to protect the animals and the environment! III.

31、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.Sharks fin（魚鰭）soup is famous and expensive all around the world.We have to kill a whole shark to get a bowl of sharks fin soup.People cut off sh

32、arks fins and throw the sharks back into the ocean.Sharks are in the bottom of the food chain in the oceans ecosystem.WildAid and the WWF are environmental protection groups in China.Sharks fin s are good for health.(2) Complete the fact sheet in 3a. Where shark fin soup is popular Number of sh

33、arks caughtand traded every yearHow much the numbers of some kinds of sharks have fallen in the last 20 to 30yearsTwo environmental groups which are 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

34、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 oceans 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 p

35、eople believe that shark fins are good for health.5. Sharks may disappear one day _ we do not do something to stop the sale of shark fins. (2) Retell the passage according to the words below.sharks fin soup, in southern China each time cut off no longer not onlybut also at the top drop be endangered

36、 the strongest around 70 million fallen by over 90 percent WildAid and the WWF develop laws scientific studiesVI. Language points1. 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. Im no longer a student. 我不再是個學(xué)生了。 有兩個短語和no longer同義，即notany longer和notany more，但他們側(cè)重的方面不

37、同。no longer和notany longer側(cè)重時間。 e.g. He no longer lives here.= He doesnt live here any longer. 他不在這兒居住了。(一個時間以前他住在這兒，過了這個時間，他就離開了。) notany more側(cè)重側(cè)重程度和數(shù)量e.g. You can drink no more. = You cant 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 harmful to the enviro

38、nment. 這種方法不但殘忍而且對環(huán)境有害。not onlybut also用于連接兩個表示并列關(guān)系的成分，著重強(qiáng)調(diào)后者，其意為“不僅而且”; 其中的also有時可以省略。e.g. 1) She not only plays well, but also writes music. 她不僅很會演奏，而且還會作曲。 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 has to leave. 不只是你，他也得離

39、開。 not only放在句首，后接句子時要用倒裝結(jié)構(gòu)。 e.g. Not only had the poor man been fined, but also he had been sent to prison. 這個可憐的人不僅被罰款，而且還被送進(jìn)了監(jiān)獄。 be harmful to 對 有害e.g. Smoking is harmful to the health. 吸煙有損健康。 Playing computer games much is harmful to students. 電腦游戲玩太多對學(xué)生有害。3. Sharks are at the top of the food c

40、hain in the oceans 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. 我看他的頭頂, 頭發(fā)光亮, 分得平滑。 He shouted at the top of his voice in order that he might be heard. 他盡力大聲叫喊, 以便別人能聽見。4. If their numbers drop too low, it

41、 will bring danger to all ocean life. 如果它們的數(shù)目降至過低，會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，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.在那個國家，城市兒童入學(xué)人數(shù)比鄉(xiāng)鎮(zhèn)及農(nóng)村要高。常與number搭配的動詞有g(shù)row, fall等。e.g. The number of familie

42、s that own cars has been growing quickly recently. 近來擁有轎車的家庭數(shù)量增長很快。5. Environment protection groups around the world, such as WildAid and the WWF, are teaching the public about “finning”. 世界各地的環(huán)境保護(hù)組織，如野生救援協(xié)會和世界自然基金會，都在教育公眾有關(guān)“獵翅”的行為。1) 句中fin本為名詞，指 “魚鰭”。此句中的finning由動詞化的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

43、述的 “獵翅”這一行為。2) WildAid和WWF組織WildAid（美國野生救援協(xié)會）是保護(hù)野生動物及棲息地環(huán)境的一個非盈利性的機(jī)構(gòu)，1999年注冊成立，其宗旨是保護(hù)及救助世界范圍內(nèi)的野生動物；WWF（世界自然基金會）英文全稱為World Wide Fund for Nature，成立于1961年，是享有國際盛譽(yù)，全球最大的獨(dú)立性非政府環(huán)境保護(hù)組織之一。VII. HomeworkWrite 5 measures to protect the environment.Section A 3 (Grammar Focus-4c)I. Revision1. Check if you know t

44、hese phrases. 不同種類的污染 河底 把垃圾扔到河里 在中起作用 在中國南部 對有害 在頂部 海洋生態(tài)系統(tǒng)2. Translate these sentences into English. 甚至是河底都滿是垃圾。 這個方法不僅殘酷還對環(huán)境有害。 鯊魚處于海洋食物鏈的頂部。 許多人相信魚翅對健康有好處。II. Grammar FocusPay attention to the sentences.1) Were trying to save the earth.2) The river used to be so clean.3) The air is badly polluted

45、.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: Present Progressive定義：表示說話時（瞬間）正在進(jìn)行的動作，也表示目前或現(xiàn)階段一直進(jìn)行的動作。結(jié)構(gòu): be (am/is/ are) + v.-ing標(biāo)志詞：Look, Listen, now, right nowe.g. Look! The boy is crying.2. used to do與be used to doingused to

46、do sth. 表示過去常常做某事, 而現(xiàn)在往往不做了, 后接動詞原形。be used to doing sth. 表示習(xí)慣于做某事。e.g. I used to get up at six oclock. Joe is used to drinking a cup of coffee every morning.3. 被動語態(tài)：Passive voice定義：表示主語是動作的承受者，即行為動作的對象的一種語態(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

47、成時: Present Perfect定義：表示動作已經(jīng)完成, 但對現(xiàn)在造成影響; 或者表示從過去某一時間開始一直延續(xù)到現(xiàn)在并還可能持續(xù)下去的動作。 結(jié)構(gòu): has/have + 過去分詞標(biāo)志詞：already, yet, ever, never, since, fore.g. I havent finished my homework yet.5. 情態(tài)動詞1) 情態(tài)動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，只能與其他動詞構(gòu)成謂語。常見的有：can (could), may (might), must, need, shall (should), will (wo

48、uld)等。2) 情態(tài)動詞無人稱和數(shù)的變化, 后接動詞原形。否定式是在情態(tài)動詞后面加not。個別情態(tài)動詞有過去式形式, 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 koala. Tracy could ride a bicycle when she was five years old. You mustnt play with fire. It is dangerous.III. Practice1. Work on 4a. Fill in the blanks with the correct forms of the v

49、erbs in brackets. Joe: _ you ever _ (take) part in an environmental project ?Eric: 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) t

50、o help out.Joe: Thats fantastic! I guess everyone in this city is _ (try) to improve the environment.Eric: Yes, we cant 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:ca

51、n, would, could, 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 instead of plast

52、ic bags. I 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 big things that _ improve the environment. Lets take action now!Lea

53、rn 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 reusable bags instead of plastic bags;ride your bike or walk to

54、school or work;stop using paper napkins;recycle books and paper4. Discussion. A: I think that everyone should use public transportation.B: I disagree. Its difficult for parents with young children to use public transportationIV. Language points1. We cant afford to wait any longer to take action! afford v. 承擔(dān)得起；提供, 給予