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Unit 13We're trying to save the earth!本单元围绕环境保护的话题，并用主题图片表现噪音污染、空气污染、水污染等内容，目的是为了让学生对环境的破坏有一个直观的认识，从而激发学生强烈的社会责任感和对未来发展的思考。
Section A的重点是让学生掌握与环境污染和环境保护相关的词汇和句型，同时引导学生关爱动物、保护环境。
教学难点是让学生学会正确使用连词和结合生活实际讲述如何保护环境。
Section B在Section A所学的基础上，进一步谈论如何保护环境。
教学重点是让学生了解环境保护的方式，并落实到积极的行动当中，同时还有阅读策略和写作技巧的训练。
教学难点是让学生在阅读2a文章之后，根据所给词根找出衍生出的不同词汇，并理解前缀和后缀的不同用法。
The First Period—Section A(1a－2d)Teaching Important Points【教学重点】Key words & phrases：litter，bottom，fisherman，coal，ugly，advantage，cost，wooden，plasticnoise pollution，air pollution，water pollution，be full of，play a part in，turn…into，cut down air pollutionKey sentences：1.Even the bottom of the river was full of rubbish.2.It used to be so clean.3.Everyone in this town should play a part in cleaning it up.4.The air is badly polluted because there are more cars on the road these days.5.The air has become really polluted around here.6.We're trying to save the earth.Key structure：should＋do；used to＋do；have/has＋done；be＋done；be＋doinge．g.Everyone should help to clean up the river.The air has become really polluted.I used to be able to see stars in the sky.The air is badly polluted.Teaching Difficult Points【教学难点】★Practice the structures to talk about pollution and environmental protection.Teaching Aids【教学工具】A tape recorder，CAI or multimedia courseware.Teaching Steps【教学过程】★Step 1Leading in【新课导入】1．Greeting2．Discussion and reviewDiscuss with the students，like this：T：What kinds of pollution are there these days?S：…T：What causes the pollution?S：…3．Review the words and expressions about the topic.★Step 2Cooperative inquiry【合作探究】1．Finish the task in 1a①Show pictures or play videos about pollution and talk about the pollution.②Read these phrases in 1a.Look at the pictures in 1a and say what they see in the pictures.Write down the words and add more words.③Ask students to say out their words in each kind of pollution.2．Finish the task in 1b①Read the instructions.Get the students to read the contents in the chart and think of what they will fill in the blanks.②Play the recording for the first time.Students listen and fill in the words.③Play the recording a second time.Ask them to check the answers.Then ask the questions.Students answer with full sentences.④Ask more questions to help students learn more details.Then play the recording for the students to role－pay the conversation.3．Finish the task in 1c①Show the key words of the conversation.Ask students to retell the contents in the chart.Like this：What：dirty；bottom，rubbish；fishWhy：littering，putting wasteHow：write to，close down；help to clean up②Read aloud the model dialogue in 1c.Then in pairs，do the oral practice with more words.③Ask two pairs to perform in class.4．Finish the tasks in 2a－2b①Use PPT or pictures to show the four kinds of pollution.Get the groups of students to havea competition to say words about the pollution one by one.land pollution：…air pollution：…noise pollution：…water pollution：…②Get the students to write down these words in their notebooks.③Play the recording for the first time.Students listen and circle the kinds of pollution.Check answers with the class.④Read the sentences in 2b.Predict the contents they will fill in.Play the recording.Students listen and complete the sentences.⑤Play the recording again.Check the answers with the whole class.5．Finish the task in 2c①Read the sample conversation in 2c.Then Read the listening materials and discuss in pairs what causes the two kinds of pollution.②Students work in pairs，making dialogues.③Ask three pairs to role－play their conversations to the class.6．Finish the task in 2d①Talk about the picture in 2d.Ask：What are your ideas for solving the air pollution/waste pollution problem？Present the new words in the conversation.Such as，coal，advantage，wooden，plastic，takeaway，bin，…②Read the conversation in 2d quickly.Find out the problems about environmental pollution in the dialogue.③Read the conversation again.Ask the students to find the ways to solve the problems of air and waste pollution.④Read aloud the conversation by the recording.⑤Learn the useful expressions：What are your ideas for doing…To cut down air pollution，we should…So together，our actions can make a difference and…⑥Role－play or read the conversation in pairs until fluently.★Step 3Homework1．What are your ideas for solving the waste pollution problem?2．Write the words about the four kinds of pollution.3．Translate the following sentences into English.(1)我们正在想办法拯救地球。
Unit 13 We are trying to save the earth.知识点及练习Section A知识点1.try v.试图，努力，尝试用法:try to do sth.尽力做某事try doing sth.尝试做某事try one's best (to do sth.) = do one's best (to do sth.)尽某人最大的努力(做某事)短语：try on试穿try out试用，参加选拔have a try 尝试，试一下let me try让我试一下2.the earth地球，表示世界上独一无二的事物前面要加定冠词the。
短语：on the earth在地球上on earth 究竟，到底3.pollution n.污染，污染物f pollute v・污染polluted adj.被污染的短语：air pollution 大气污染，空气污染noise pollution 噪音污染water pollution 水污染4.litter v.扔垃圾n・垃圾二rubbish = trash短语：take out the rubbish 倒垃圾throw rubbish / litter 扔垃圾5.the bottom of ............ 的底部the top of... …的顶部6.be full of = be filled with 充满 ....7.play a part参与…；起作用play a part in “在…方面起作用；参与・・・”，后接名词、代词或动词・ing形式。
8eCUt短语cut down减少，把……砍倒cut in插话cut off切断；断绝cut up切碎cut out删除9. instead of介词短语，后跟名词、代词或动词ing形式。
instead副词，常位于句末。
位于句首时，其后有逗号。
10.Ifs good for health and it doesn't cost anything! (P98)11.be good for 对... 有益，反义词组be bad forobe good at 擅长”，后接名词、代词或动词・ing形式，同义词组do well in obe good with “善于应付.. ”。
Unit 13 W e’re trying to save the earth!知识点总结词汇过关1.v. 乱扔n. 垃圾；废弃物2. n. 底部；最下部4. n. 煤；煤块5.adj. 公众的；公共的n. 民众；百姓6.adj. 丑陋的；难看的7.n. 优点；有利条件8. v. 花费n. 花费；价钱9.adj. 木制的；木头的10.adj. 塑料的n. 塑料；塑胶11. 有关系，作用，影响12. n. 鲨鱼13. n（.鱼）鳍14.（短语）割掉；砍掉15. n. 方法；措施16. adj. 残酷的；残忍的17. adj. 有害的18. n. 链子；链条19. n. 生态系统20.adj（.数量等）减少的；低的；矮的21. n. 工业；行业22. n. 法律；法规23. adj.可重复使用的；可再次使用的24. v. 承担得起（后果）；买得起25. n. 运输业；交通运26. v. 回收利用；再利用27. n. 餐巾；餐巾纸28.(短语）颠倒；倒转29.n. 大门30.n. 瓶；瓶子31.n. 负责人；主席；总统32. n. 灵感；鼓舞人心的人（或事物33.n. 金属34.n. 创造力；独创性一．本单元语法复习：（1）现在进行时（1）含义：表示正在发生或进行的动作。
（2）基本结构：主语+ be + 现在分词（be 的形式随主语的变化而变化）（3）基本用法：①表示现在正在进行的动作。
特征：常常与now或具体的时间连用，有时句中会有感官动词来提示，或通过上下文来暗示。
②表示现阶段一直进行的动作。
这类动词常常是延续性动词。
常于at present, this week, these days等连用。
③表示主语的特征、性格、能力等(2)现在完成时（1）含义：表示过去发生的动作对现在还有影响。
（2）基本结构：主语+ have / has + 过去分词（3）基本用法：①表示过去发生的动作，但强调对现在产生影响。
Unit 13We’re trying to save the earth. Section A(3a～3b)一、短语翻译1.对……有害2.在……顶部3.食物链4.参加5.关掉6.付费7.采取行动二、根据句意及汉语提示填写单词。
1．The thief was so (残酷的) that he killed the owner of the shop. 2．The dirty water is (有害的) to your health. Don't drink it. 3．Our city aims to develop its (工业)．4．We should make some (法律) to protect the environment.5．Li Lin's family couldn't (承担) the education for her.三、用方框中所给单词的适当形式填空。
2．Water pollution will bring even death to the ocean animals. 3．It's too (noise) in the room. Let's find a quiet place.4．it was very hot，all the workers didn't stop working. 5．You should make more research before making a decision.四、单项选择。
1. — Mum, may I play computer games this evening?— No way, you finish your homework.A．can B．must C．may D．will2. — Some children can't afford necessary stationary.— Let's donate our pocket money to them.A．buy B．buying C．to buy D．be bought3. About thirty-eight people in Manila Casino Hotel attack on June 2nd. A．kill B．kills C．killed D．were killed4. A number of visitors visiting the West Lake and the number of the visitors increasing.A．are；is B．is；are C．are；are D. was; are5. — How much is the ticket to Central Park?— A one-way ticket $40, and you can another $20 for a round－trip. A．costs; pay B．cost; spend C．pay; spend D．spends; pay6. If farmers trees and forests, giant pandas nowhere to live.A. cut down; haveB. will cut down; will haveC. will cut down; haveD. cut down; will have7. I think drinking milk is good our health.A. forB. toC. withD.at五、根据汉语意思完成句子，每空一词。
Unit 13 We’re 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：We’re 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usedto 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.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 : noise pollution loud music planes mobile phones building houses air 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 thebottom (底部) of the river was full of________. There were no more ______ forfishermen (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 askthem to ___________ the factories. Everyoneshould help to __________ the river.Keys: really dirty rubbish 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 3IV. 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. We’re trying to save the earth!我们正在竭尽全力拯救地球!try to do =try one’s 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 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 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. 2a Listen to the interview. Circle the kinds of pollution that Jason and Susan talk about.A. land pollutionB. air pollutionC. noise pollutionD. 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 air with a lot of black smoke.3) There is also too much rubbish and waste. People _________________ thingsevery 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 the interviewer talking to?2) What are they talking?3) What other problems do they see?Keys: Susan and Jason.The environmental problems.There’s 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 air has become really polluted around here. I’m 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 the lights 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.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. There are other advantages (优点) of bike riding. It’s good for health and it doesn’t 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. Summary and language points1. 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。
