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1、Unit 13 Were trying to save the earth!-Section A （Grammar focus4c）【预习目标】1.掌握以下词汇，词组和句型基本词汇：litter, advantage, bottom, fisherman, coal, ugly, cost, wooden, plastic, takeaway, bin, shark, fin, method, cruel. Harmful, chain, ecosystem, industry, law, scientific, afford, reusable, transportation, recycl
2、e, 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 badl
3、y polluted.No scientific studies have showed that shark fins are good for health.We should help save the sharks.2. 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.有环境危机意识，学会关注环境保护环境。【预习重点】Unit 13 Were trying to save the earth!-Section A （Grammar focus4c）【预习难点】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。【课前自学】1大声朗
4、读100页Grammar Focus的句子2遍，并翻译。翻阅资料总结归纳现在进行时，现在完成时，被动语态，情态动词和used to 句型的用法2.完成100页4a, 4b, 4c,的练习题【我的疑问】在课前自学中，你有什么疑问？请你写下来，待课堂上老师和同学共同探究解决吧！_。【合作与探究】1. 复习巩固Check if you know these phrases. 不同种类的污染 河底 把垃圾扔到河里 在中起作用 在中国南部 对有害 在顶部 海洋生态系统Translate these sentences into English. 甚至是河底都满是垃圾。 这个方法不仅残酷还对环境有害。 鲨
5、鱼处于海洋食物链的顶部。 许多人相信鱼翅对健康有好处。2. 知识探究 现在进行时: Present Progressive定义：表示说话时（瞬间）正在进行的动作，也表示目前或现阶段一直进行的动作。结构: be (am/is/ are) + v.-ing标志词：Look, Listen, now, right nowe.g. Look! The boy is crying. used to do与be used to doingused to do sth. 表示过去常常做某事, 而现在往往不做了, 后接动词原形。be used to doing sth. 表示习惯于做某事。e.g. I use
6、d to get up at six oclock.Joe is used to drinking a cup of coffee every morning. 被动语态：Passive voice定义：表示主语是动作的承受者，即行为动作的对象的一种语态。结构：be + 过去分词e.g. A new school was built last year.Our classroom is cleaned every day. 现在完成时: Present Perfect定义：表示动作已经完成, 但对现在造成影响; 或者表示从过去某一时间开始一直延续到现在并还可能持续下去的动作。结构: has/h
7、ave + 过去分词标志词：already, yet, ever, never, since, fore.g. I havent finished my homework yet. 情态动词1) 情态动词本身有一定的词义，表示说话人的情绪.态度或语气，但不能单独作谓语，只能与其他动词构成谓语。常见的有：can (could), may (might), must, need, shall (should), will (would)等。2) 情态动词无人称和数的变化, 后接动词原形。否定式是在情态动词后面加not。个别情态动词有过去式形式, 可用来表达更加客气.委婉的语气。e.g. Ken c
8、an climb up the tress like a koala.Tracy could ride a bicycle when she was five years old.You mustnt play with fire. It is dangerous.3.知识运用 work on 4a, 4b, 4c4.分组谈论A: I think that everyone should use public transportation.B: I disagree. Its difficult for parents with young children to use public tra
9、nsportation总结本课自己的收获，小组内交流。_【达标小检测】一、单选1. Today environment pollution is a serious problem in the world. We must do _ to stop it.A. some B. any C. something D. anything2. In the eyes of modern agriculture. chemicals are harmful _ the farming land.A. bv B. in C. at D. to3. I am sure that what you are
10、 doing now will make _ in your life.A. a mistake B. a chanceC. a difference D. an effort4. Its said that smoking wont be _ in indoor public places or workplaces in China soon.A. attacked B. admired C. attracted D. allowed5. Look! There _ the new bridge. It _ last month.A. is；build B. was；builtC. is；
11、was built D. is：is built6. 一What a clean and bright classroom. isnt it?一Yes，its always clean and bright because it _ every day.A. cleans B. cleanedC. is cleaned D. was cleaned7. 一Are you going to the party?一No，because I _.A. have asked B. havent askedC. have been asked D. havent been asked8. Chinese _ by the largest number of people.A. is speaking B. speakC. speaks D. is spoken