13单元第一课时

1、 Many hands make light work. 2··_学校 九 年级 上 册英语Unit_13_教学案课题Unit 13 Were trying to save the earth!课时Period 1授课日期课型听说课主备教师郭春梅审核人张梅莲学习内容Section A 1a2d教学目标1、熟练掌握词汇： litter, advantage, bottom, fisherman, coal, ugly, cost, wooden, plastic, takeaway, bin, 2、熟练掌握短语： save the earth, noise / air / w

2、ater pollution, the bottom of, be full of 3、掌握并运用下列句型： Were trying to save the earth! The river used to be so clean. The air is badly polluted.4.能正确运用现在进行时，现在完成时和used to 句型。教学重点掌握本课时的重点词汇及句型;能正确运用现在进行时，现在完成时和used to 句型教学难点能正确运用现在进行时，现在完成时和used to 句型教 学 设 计教 学 过 程Step 1 Lead-in （导入）Show the picture o

3、f 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.Step 2 Self-study (自主学习)1. Read words on P168 individually. From litt

4、er to bin，help them if they need, read together ,correct the pronunciations. 2. Read these words loudly, try to remember them.3. check-in: 通过小组竞赛的形式巩固单词，可上黑板上写，可口头翻译抢答等。Step 3 Cooperation & Presentation (合作探究与展示)1. Go through 1a: Here are some words related to different kinds of pollution. Write

5、 them in the box below. Then add more words.2. Listening 1b Listen and complete the sentences. 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

6、for help.探究：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3. Everyone in this

7、town should play a part 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, b

8、ut 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。 3.Practice Role-play

9、 the conversation in 1c.4. Listening 1). 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.5. Pair work Use the information

10、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 6.Work on 2d. 1). Read 2d and complete the chart.ProblemsSolving problemsair

11、 pollutionwaste pollutionwooden (木头的) chopsticks or plastic forksrubbish2). Role-play the conversation.探究：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

12、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？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

13、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) som

14、e 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.小试身手：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 usu

15、ally _ 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.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 h

16、is 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？ Step 4 随堂检测I、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.II. 单项选择。1. He _ go ou

17、t with his parents, but now he _ staying at home alone. A. used to; is used toB. is used to; used toC. use to; is used toD. is used to; is used to2. The interesting book _ me 10 yuan. A. spentB. tookC. paid D. cost 3. We must do something useful to _ pollution. A. cut offB. cut up C. cut down D. cut

18、 in 4. Smoking can _ lung cancer. Youd better give it up. A. work onB. lead to C. take awayD. put out 5. What are the _ of bike riding? It can help cut down air pollution. A. advantages B. reasons C. resultsD. ideas III. 根据汉语提示完成下面的句子。1. 多一个人少一个人无所谓。 One person wouldnt _ _ _. 2. 这个木箱时装满了书。 The _ box

19、 _ _ _ books. 3. 不健康的饮食对这种疾病的传播起一定的作用。 Unhealthy foods _ _ _ _ the spread of the disease. 4. 这条小路通向公园。 The path _ _ the park. 5. 我错拿了你的包。 I took your bag _ _ mine by mistake.IV、阅读：When the Audet family turns on the lights at Blue Farm, they are using electricity that comes from cowscow manure (粪肥),

20、to be specific.3Cows produce a lot of wastes. One cow can create 30 gallons of wastes each day. Now imagine the output of over 1,000 cows at Blue Farm. Thats really a big amount.When farmers clean their barns, they put the wastes in a big heap, and spread some of them on their fields for fertilizer(

21、肥料). But now places like Blue Spruce Farm have a new way of using cow wastes. They use them to produce electricity.21 5Heres how it works: A big machine moves back and forth cleaning the barn floor. “The cows arent bothered,” says Marie Audet. “They are animals of habit; they get used to it, and jus

22、t lift one foot and then another to let it go by.” 4The machine pushes the manure into a big 600-gallon tank like a small swimming pool. The tank is called a digester (化粪池) because what happens there is just like what happens inside a cow: Bacteria(细菌) get to work and continue to digest the manure.M

23、ethane gas (甲烷、沼气)in the atmosphere is known as a “greenhouse” gas because it keeps heat just like a greenhouse does, causing our planet to warm up. Thats an environmental concern. But the digester has a good result. Its gas is kept and used to power electric generators (发电机).At Blue Farm, the generators make enough electricity to power 400 homes. The Audet family sells the extra electricity they cant use themselves.1. We learn from the text that the Audet family is using cow wastes to _. A. make electricity B. produce fertilizerC. build their farmD. feed the cows