2020-2021学年人教新目标九年级下册英语 Unit 13 Section A (1a-2d) 课件

1、学练优九年级英语下（RJ） 教学课件Section A (1a-2d)Unit 13 Were trying to save the earth!学习目标 Key words & phrases: litter, bottom, fisherman, coal, ugly, advantage, cost, wooden, plastic, make a difference Key sentences: 1. The river was dirty. Even the bottom of the river was full of rubbish. 2. But it used to be

2、so clean! 3. Yes, but people are throwing litter into the river.Read and learnWords and expressionsLead inThe earth is polluted.air pollutionThe factories that burn coal pollute the air with a lot of black smoke. water pollutionFactories put waste into the river.litter v. 乱扔 n. 垃圾rubbish waste 垃圾 废弃

3、物mobile phone pollutionnoise pollutionThere are more cars on the road.Presentation1aHere 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 pollut

4、ion _ air pollution _ water pollution _loud musicplanesmobile phonesfactoriescarssmokingshipsfactorieslitteringrubbishbuilding housesbuilding houses1bListen 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 fish

5、ermen (渔民) to catch.really dirtyrubbishfishWhat 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.litterwastegovernmentclose do

6、wnclean up1cThe river was dirty. Even the bottom of the river was full of rubbish.But it used to be so clean!Role-play the conversation. Yes, but people are throwing litter into the river.Everyone in this town should play a part in cleaning it up!PracticeMake conversations about the kinds of polluti

7、on in 1a.Language points1. Were trying to save the earth! 我们正在竭尽全力拯救地球! try to do sth.=try ones best to do sth. 努力去做某事。 e.g. Every student should try to study hard in order to study in a good university. 为了进入一所好大学学习，每个学生 都应该努力学习。2. Here are some words related to different kinds of pollution. be rela

8、ted to 与有关 e.g.I am notrelatedtohim in any way. 我和他无任何关系。 3. Everyone in this town should play a part in cleaning it up! play a part in 在方面起作用;在中扮演角色 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。 He was invited to play a part in this TV play. 他被邀请参加这个电视剧

9、的演出。4. 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)”且不可回收。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 yo

10、ur litter after a picnic. 野餐后将废弃物收拾好。 2aListen to the interview. Circle the kinds of pollution that Jason and Susan talk about. land pollution B. air pollutionC. noise pollution D. water pollution2bListen again and complete the sentences.1. The air is badly polluted because there are _ on the road t

11、hese days.2. Factories that burn coal also _ the air with a lot of black smoke.more carspollute3. 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 (丑陋的) ones. are throwing awaypublic placesUse

12、 the information in 2a and 2b to role-play conversations between Jason and Susan.2cThe air has become really polluted around here. Im getting very worried.Yes, I used to be able to see stars in the sky.The problem is that What should we do to save the earth?Discussion1. Turn off the lights when we l

13、eave a room.关掉2. stop riding in cars3. stop using paper towels or napkins（餐巾，餐巾纸）4. recycle books and paper回收利用5. .2dRead 2d and complete the chart.ProblemsSolving problemsair pollutionwaste pollutionrubbishtake the bus, subway or ride a bike instead of drivingbring a bag to go shopping, never take

14、wooden chopsticks or plastic forks but use the ones at home while buying takeway foodthrow rubbish in the binsRole-play Jason and Susan, what are your ideas for solving these problems?Language pointsThis is turning beautiful places into ugly ones. turn into 把变成e.g. The icy rain seemed to turn into s

15、now. 冻雨似乎要变成雪花了。 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. 王先生花了200元买了新衬衫。 How much does the new computer cost? 这台新电脑花了多少钱？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

16、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

17、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

18、_them lots of money.2. Mona _ 50 yuan on the books just now.3. It usually _ me an hour to do my homework.costspenttakes4. You should _ some time practicing your pronunciation.5. My brother _6, 000 yuan for the new computer yesterday.spendpaid3. So together, our actions can make a difference and lead to a better future! make a difference (to) (对)产生影响或作用 e.g. Do you think his words would make any difference to 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。用动词的