Unit 13 We are trying to save the earth教案

1、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,

2、 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 stu

3、dies 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 (1

4、a-2d)Learning objectives:1. To listen for specific information.2. To talk about pollution and environmental protection.3. To learn to use the sentence patterns. used to.but now should do sth.I. PresentationShow the picture of the earth and tell students the earth is polluted now. For example: (1) Th

5、e 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

6、 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 th

7、e 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 h

8、elp 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 fu

9、ll 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.3. 原文 used to do sth. “过去常常” 表示过去习惯性的动作但如今已不存在。 play a part in doing sth. “参与做某事; 在做某事上起作用”。IV. Practice1. Role-play the conversation

10、 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 h

11、as 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

12、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 尽力去做某事 【运用】 我会尽力做好这项工作。_

13、Well try to finish the work in a week.    try短语 try doing sth. 试着做某事 try on  试穿try out  尝试；试验；试试 用try短语的适当形式填空。1) I went to the tailors to _ my new suit.2) Lets _ your method. It seems very good.3) I think you should _ to improve your English.4) Let me _ the story.

14、 让我试着讲一讲这个故事吧。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？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

15、. 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 d

16、ay.4) People are also littering in _ like parks. This is turning beautiful places into ugly (丑陋) ones. Complete the sentences according to the dialogue.1. I _ _ _ able to see stars in the sky, but now I cant see them clearly. used to be2. The air _ _ really _ around there. has becomepolluted3. Peopl

17、e are also _ in the public places. littering4. The factories that burn _ also _ the air with a lot of black smoke. coalpolluted 3. 原文 Pay attention to the sentences.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

18、 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 pap

19、er 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. Complete the sentences.What should we do?1. We should take _ or _ instead of driving.2. We should also _ _

20、_. Its good for health!3. Bring _ to go shopping.4. Never take _ or _ when buying takeaway food.5. _ in the bins and keep public places clean and beautiful.3. Role-play the conversation.Interviewer: Jason and Susan, what are your ideas for solving these problems?Jason: Well, to cut down air pollutio

21、n, 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 sh

22、opping 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

23、 together, our actions can make a difference and lead to a better future!4. Pay attention to the sentences.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 th

24、e 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

25、(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多表示花费金钱，主语通常是物，常用于sth. cost(

26、s) (sb.) some money. 句型。 e.g. The new dress cost Linda 80 yuan.(1) It takes sb. some time to do sth. (主语为it)(2) sb. spend(s) time/money on sth. (主语为sb.) sb. spend(s) time/money (in) doing sth.(3) sb. pay(s) money for sth. (主语为sb.)(4) sth. cost(s) sb. money (主语为sth.)根据句意用take, spend, pay或cost的适当形式填空。

27、1) That new car _ them lots of money.2) Mona _ 50 yuan on the books just now.3) It usually _ 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.2. So together, our actions can make a diff

28、erence and lead to a better future! make a difference (to) 表示(对)产生影响或作用 make no difference to 对没有影响 e.g. Learning English well can make a difference to your future. 学好英语会对你的前途有影响。XI. Summary. Exercises. 根据句意及所给首字母提示，补全句中所缺单词。1. C          &

29、#160;      can be used to produce electricity.2. The new car c                 a lot of money, but it was certainly worth it.3. There is a w      

30、;           bed, a table and two chairs in this small room.4. It is a very clean city. You will hardly find l                when you walk along the street.5. M

31、y uncle is a great f                 and he caught four fish this morning.6. Some cups in the shop are nice and expensive and the others are u          

32、60;      and cheap.7. Living in this street has a lot of a                . The only drawback (弊端) is noise. 根据句意，从方框中选择恰当的短语填空，有的需要变换形式。write to, lead to, clean up, cut down, play a part in

33、1. What a mess! You should _ your room now.2. Every farmer knows that weather _ farming.3. As we all know, smoking too much can _ cancer and many other illnesses.4. He said he would _ us when he left home but we haven't heard from him so far.5. The manager asked me to _ the report, because he di

34、dn't want to speak too long at the meeting. 根据汉语意思完成英语句子，每空一词。1. 牛奶对孩子们的健康有好处。Milk _ _ _ children's health.2. 辛迪，请记得帮我寄信。Cindy, please _ _ _ me send the letter.3. 刚才乔重重地摔到楼梯下面。Joe landed heavily _ _ _ _ the stairs just now.4. 我们没有茶。你愿意喝点咖啡代替茶吗？We don't have any t

35、ea. Would you like coffee _ _ tea?  5. 人们普遍认为，教育会对一个人的生活产生影响。People generally agree that education can _ _ _ _ a person's life.Think aboutThe earth is badly polluted. Please make a poster and think of what we can do.Homework1. Write a short passage about how to protect our environ

36、ment.2. Preview the article on page 99.Section A 2 (3a-3c)Learning objectives1. To have the awareness of protecting the sharks and respecting nature.2. To understand the passage about the endangered animal sharks.3. To learn to use some words and expressions.I. RevisionTranslation.甚至是河底都满是垃圾。这个小镇上的每

37、个人都应该参加打扫。骑自行车有其它的优点。我买外卖食品从来不拿木筷子和塑料叉子。II. Warming up 1. T: The earth is badly polluted. What should we do to save the earth? Lets take action. For example: Turn off the lights when you leave a room; Take buses instead of driving carsRecycle books and paper.2. There are some animals which are endan

38、gered. We should do something to protect the animals and the environment! III. Discussion1. What do you know about shark(鲨鱼)?2. Do you think sharks can be endangered? Why?3. What do you think might cause a fall in the number of sharks?IV. Reading1. Listen and match the main ideas. Talk about shark f

39、in soup. Sharks are endangered now. Call on people against eating shark fins.2. True or false. (Paragraph 1)Sharks fin（鱼鳍）soup is famous and expensive all around the world.Youre killing a whole shark when you enjoy a bowl of shark fin soup.3. Read Paragraph 2 and fill in the chart.4. True or false.

40、(Paragraph 3)1. WildAid and the WWF are environmental protection groups in China.2. Two environmental groups call on the government to establish laws to stop the sale of shark fins.3. Sharks fins are good for health.5. Complete the fact sheet in 3a. Where shark fin soup is popular Number of sha

41、rks caughtand traded every yearHow government can help Two environmental groups which are against “finning”6. Retell the passage. sharks fin soup, in southern China each time cut off no longer not onlybut also at the top drop be endangered the strongest around 70 million fallen by over 90 percent Wi

42、ldAid and the WWF develop laws scientific studiesV. Practice (Work on 3b)1. Read the passage and fill in the blanks with the words in the box.1) Many people do not realize they are killing a whole shark _ they enjoy a bowl of shark fin soup.2) Sharks are at the top of the food chain, _ if their numb

43、ers drop, the oceans ecosystem will be in danger.3) Many think that sharks are too strong to be endangered, _ they are wrong.4) _ there are no scientific studies to support this, a lot of people believe that shark fins are good for health.5) Sharks may disappear one day _ we do not do something to s

44、top the sale of shark fins.2. Group WorkWhat can we do to save the sharks? Work with your partner and make a poster about shark protection.VI. Language points1. A shark can no longer swim and slowly dies. 鲨鱼不能再游泳然后慢慢死掉。no longer 不再 = notany longer/ not any moreno longer通常位于实义动词之前，be动词、助动词或情态动词之后 。no

45、t . any longer/anymore中的any longer/anymore总是放在句末。no longer与not . any longer可以互换。 e.g. Mr Brown no longer works here. = Mr Brown doesnt work here any longer/ any more.Joe no longer likes dancing. _Joe doesnt like dancing any longer/ any more.2. This method is not only cruel, but also harmful to the e

46、nvironment. 这种方法不但残忍而且对环境有害。1）not onlybut also用于连接两个表示并列关系的成分，着重强调后者，其意为“不仅而且”; 其中的also有时可以省略。Not only does my sister sing well, but she dances well.我姐姐不但歌唱得好，而且舞也跳得好。Not only the students but also the teacher is working hard.不仅学生们在努力，而且那位老师也在努力。当not only置于句首时，常用_。 倒装语序not only. but also.连接两个主语时，谓语动

47、词需与_那个主语在人称和数上保持一致，就近原则。后面【运用】同义句转换，每空一词。(1)She and I have already been to Beijing. _ _ she _ _ I have already been to Beijing. Not only but also (2)He likes to swim and he wants to teach the kids to swim, too.Not only _ _ _ to swim, _ he wants to teach the kids to swim. does he like but(3) The twin

48、s were late this morning. Sam was late this morning, too.  Not only the twins _ _ Sam _ late this morning. but alsowas _ _ Sam but also the twins _ late this morning. Not onlywere 2) be harmful to 对 有害 be bad for 对有害 e.g. Smoking is harmful to the health. 吸烟有害健康。 Playing computer games much is

49、harmful to students. 电脑游戏玩太多对学生有害。3. Sharks are at the top of the food chain in the oceans ecosystem. 鲨鱼位于海洋生物系统食物链的顶部。at the top of 在.最高地位; 用最高最大的(速度, 声音等) e.g. He shouted at the top of his voice in order that he might be heard. 他尽力大声叫喊, 以便别人能听见。4. If their numbers drop too low, it will bring dange

50、r to all ocean life. 如果它们的数目降至过低，会给所有海洋生物带来危险。此句复数形式的number表达全海洋中鲨鱼的总量。In that country, the number of children going to school is higher in cities than in towns and village.在那个国家，城市儿童入学人数比乡镇及农村要高。当表示数值的高或低时，number要用_修饰。常与number搭配的动词有grow, fall等。high或 lowe.g. 近来拥有轿车的家庭数量增长很快。_The number of families t

51、hat own cars has been growing quickly recently. Summary1. 把垃圾扔到河里2. 在中起作用3. 在中国南部 4. 对有害5. 在顶部 6. 海洋生态系统Homework1. Review the new words and expressions youve learned today.2. Write 5 measures to protect the environment.Section A 3 (Grammar Focus-4c)Learning objectivesTo review the use of The Present

52、 Continuous Tense, passive voice, Present Perfect and Modal Verbs.I. Revision1. 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2. Translation. 甚至河底都满是垃圾。 这个方法不仅残酷还对环境有害。 鲨鱼处于海洋食物链的顶部。 许多人相信鱼翅对健康有好处。II. Grammar FocusPay attention to the sentences.1) Were trying to save

53、the earth.2) The river used to be so clean.3) The air is badly polluted.4) No scientific studies have shown that shark fins are good for health.5) We should help save the sharks.1. They are playing basketball. Nancy is working on a new book about stories in schools. Why are you always coming late fo

54、r class? 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.2. 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 used to get up at six ocloc

55、k. Joe is used to drinking a cup of coffee every morning.3. My grandfather built this house in 1930. This house was built (by my grandfather) in 1930.主动语态表示主语是动作的执行者,被动语态表示主语是动作的承受者。 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 cl

56、eaned every day.一般现在时的被动语态：am/is/are + V-ed一般过去时的被动语态：was/were+ V-ed一般将来时的被动语态：will/shall+be+ V-ed不可以变成被动语态的情况 1. 某些感官动词加形容词及少数其他的动词与一些副词连用表示被动意义。 smell, taste, prove, sell, etc. 1) The dish tastes delicious. 2) The theory proved right at last. 3) The book is so interesting that it sells well. 4) The pen writes well. 2. need做实意动词时，need + V- ing 主动形式表示被动意义。 我的车需要修理。 My car needs repairing. (= to be repaired). 3. 通常只有及物动词（组）才有被动 语态，不及物动词没有。战争爆发