英语人教版九年级全册unit13 sectionA 1a.doc

Unit 13 Were trying to save the earth!一、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, 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 polluted. 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 to 句型。三、教学步骤:Section A 1 (1a-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 road.Learn some new words.II. Work on 1aHere 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 _ _ _ _ _ _ _ _ _III. Listening1. Work on1b. 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 river.How should the problem be solved?We should write to the _ and ask them to _ the factories. Everyone should help to _ the river.2. Listen again and answer the following questions.1) What does Tony want to do later this afternoon?He wants to go swimming with Mark in the river later this afternoon.2) Why doesnt Mark want to go with Tony? Because the river was really dirty. Even the bottom of the river was full of rubbish, and there were no more fish for fishermen to catch. 3) How was the river in the past? It used to be so clean. It has been the nicest river in this town.IV. Practice1. Role-play 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 in 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 river.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! 我们正在竭尽全力拯救地球! try to do =try ones best to do 努力去做某事。 e.g. Welltryto finish the work in a week. 我们将努力在一周内完成这项工作。2. Here are some words related to different kinds of pollution. be related to 与有关 e.g. Is the driver relate to the accident? 司机和这起事故有关吗？3. .Even the bottom of the river was full of rubbish. Yes, but people are throwing litter into the 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e.g. Throw the rubbish out. 把垃圾扔出去。 The room is full of rubbish. 房间里堆满了垃圾。 Pick up your litter after a picnic. 野餐后将废弃物收拾好。 VI. Listening1. Work on 2a. Listen to the interview. Circle the kinds of pollution that Jason and Susan talk about.A. land pollution B. air pollutionC. noise pollution D. water pollution2. Work on 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 in _ like parks. This is turning beautiful places into ugly (丑陋) ones. VII. Practice (Work on 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 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; stop using paper towels or napkins; recycle books and paper.IX. Reading1. Read 2d and complete the chart.ProblemsSolving problemsair pollutionwaste pollutionwooden (木头的) chopsticks or plastic forksrubbish2. 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. 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 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. Language points1. 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. 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？辨析 take, spend, pay & costtake，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. 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 breakfast yesterday.4) cost多表