1、 Unit 13 Were trying to save the earth!Section A 1 (1a-2d)1、教学目标：1. 语言知识目标 基本词汇：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,
2、upside, gate, bottle, president, inspiration, iron, work, metal, creativity, 基本词组：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 pollu
3、ted. No scientific studies have showed that shark fins are good for health. We should help save the sharks. 2. 技能目标: 能正确运用现在进行时，现在完成时，被动语态，情态动词和 used to 句型。 3. 情感目标: 有环境危机意识，学会关注环境保护环境。二、教学重难点： 1. 教学重点：（1）能正确运用现在进行时，现在完成时，被动语态，情态动词和 used to 句型。 （2）保护环境的措施方法。 2. 教学难点：能正确运用现在进行时，现在完成时，被动语态，情态动词和 used
4、to 句型。三、教学步骤: 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 into the river. (3) People should throw away litter in the bin. (4)There are more
5、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 ships factories smoking building houses mobile phones noise pollution air pollution water pollution _ _ _ _ _ _ _ _ _
6、 _ _ _ 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 (渔民) to catch. What caused the problem? People are throwing _ into the river. Factories are putting _ into the riv
7、er. 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 up 2. Listen again and check () the sentences you hear.IV. Practice 1. Role-play the conversat
8、ion 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 in 1a. A: Th
9、e 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 river. B
10、: 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 points 1. Were trying to save the earth! 我们正在竭尽全力拯救地球 ! try to do =try ones best to do 努力
11、去做某事。 e.g. Every student should try to study hard in order to study in a university. 为了进入大学学习，每个学生都应该努力学习。 2. Here are some words related to different kinds of pollution. be related to 与 有关 e.g. I am not related to him in any way. 我和他无任何关系。 3. Everyone in this town should play a part in cleaning it
12、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. 健康的饮食在帮助人们长寿方面起着非常大的作用。 play a part 在中扮演角色 e.g. He was invited to play a part in this TV play. 他被邀请参加这个电视剧的演出。 4. Even the bottom of the river was full of rubbish. Yes, but people are throwing litter into th
13、e river. litter 和 rubbish 都可指“垃圾” ，用作不可数名词。 rubbish 指“没用的东西(被扔或将要丢弃的无用的东西)”不可回收。 litter 指“( 室内或公共场所)乱扔的废物(纸屑、不要的包装纸、废瓶等 )”还可回收 VI. Listening.1. 2a Listen to the interview. Circle the kinds of pollution that Jason and Susan talk about. A. land pollution B. air pollution C. noise pollution D. water po
14、llution 2. 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 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 i
15、n _ like parks. This is turning beautiful places into ugly (丑陋) ones. Keys: 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?The environmental problems. Theres too
16、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 air 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
17、that VIII. Discussion Ask 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 poll
18、ution waste pollution wooden (木头的) 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
19、. There are other advantages (优点) of bike riding. Its good for health and it doesnt cost (花费) 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
20、take wooden chopsticks or plastic (塑料) forks when I buy takeaway (外卖食品) 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! X.
21、Summary and language points 1. This is turning beautiful places into ugly ones. turn into 把变成 e.g. The icy rain seemed like to turn into snow. 渐渐地冻雨又变成雪花的模样。 2. Its good for health and it doesnt cost anything!cost v. 花费；使付出 指花费金钱，主语通常是物。cost 的过去式和过去分词均为 cost。 e.g. The new shirt cost Mr Wang 200 yuan
22、. 王先生花了 200 元买了新衬衫。 How much does the new computer cost? 新电脑花了多少钱？ take, spend, pay & cost take，spend ， pay 和 cost 都可以表示“花费” ，但它们的用法各有不同。 1) take多表示花费时间，常用于 It takes sb. some time to do sth.这一句型中，其中 it 作形式主语。 e.g. It usually takes me 40 minutes to cook the dinner. 2) spend 多表示花费时间和金钱，主语通常是人，常用于 sb.
23、spend(s) some time / money on sth.和 sb. spend(s) some time / money (in) doing sth.两种句型。 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 多表示花费金钱，主语通常是人，常用于 sb. pay(s) some money for sth.句型。 e.g. Tommy paid 20 yuan for his breakfa
24、st yesterday. 4) cost 多表示花费金钱，主语通常是物，常用于 sth. cost(s) (sb.) some money. 句型。 e.g. The new dress cost Linda 88 yuan. 根据句意用 take, spend, pay 或 cost 的适当形式填空。 1) That new car _ them lots of money. 2) Mona _ 50 yuan on the books just now. 3) It usually _ me an hour to do my homework. 4) You should _ some
25、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 future! make a difference (to) 表示(对)产生影响或作用 e.g. Do you think his words would make any difference to
26、 the final decision? 你认为他的话会对最后的决定产生影响吗？ The new teacher always encourages little Tom. This has made a big difference to him. 新来的老师总是鼓励小汤姆，这对他影响很大。 XI. Exercises 用动词的适当形式填空。 1) Were 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 wooden XII. Think about The earth is badly polluted. Please make a poster and think of what we can do. XIII. Homework 1. Copy the new words and remember them. 2. Read the listening materials of 1b, 2a.
