1、Unit 13 Were trying to save the earth! 一、一、教学目标教学目标： 1. 语言知识目标语言知识目标 基本词汇基本词汇：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, up
2、side, gate, bottle, president, inspiration, iron, work, metal, creativity, 基本词基本词组组： 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. 技能目标技能目标: 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. 情感目标情感目标: 有环境危机意识，学会关注环境保护环境。 二、二、教学重教学重难难点点： 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
4、行时，现在完成时，被动语态，情态动词和 used to 句型。三、三、教学步骤教学步骤: Section A1 (1a-2d) I. Presentation Show 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 shoul
5、d throw away litter in the bin. (4)There are more cars on the road. II. Learning Here are some words related to different kinds of pollution. Write them in the box below. Then add more words. loud musiccarsrubbishplaneslitteringshipsfactories smokingbuilding housesmobile phones noise pollutionair po
6、llutionwater pollution _ _ _ _ Keys : noise pollutionloud musicplanesmobile phonesbuilding houses air pollutionfactoriessmokingcarsbuilding houses water pollutionshipsrubbishlitteringfactories III. Listening 1. 1b Listen and complete the sentences. What was the problem?Theriverwas_.Eventhe bottom (
7、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 help to
8、 _ the river. Keys: really dirtyrubbishfishlitterwastegovernment close downclean up 2. 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 h
9、elp. Keys: 2 3 IV. Practice 1. 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!
10、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?
11、 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 points 1. Were trying to save the e
12、arth!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 e.g. I am not related to him in any way. 我和他无任何关系。 3. Everyo
13、ne in this town should play a part in cleaning it up! play a part in在方面起作用 e.g. Agood 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 rubbi
14、sh. 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. List
15、ening 1. 2a Listen to the interview. Circle the kinds of pollution that Jason and Susan talk about. A. land pollutionB. air pollution C. noise pollutionD. water pollution Keys: BA 2. 2b Listen again and complete the sentences. 1) The air is badly polluted because there are _ on the road these days.
16、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 day. 4) People are also littering in _ like parks. This is turning beautiful places into ugly (丑陋) ones. Keys: more carspolluteare throwing awaypublic places 3. Li
17、sten 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. Theres too much rubbish and waste in the streets. VII. Practice (2c) Use the information in 2a and 2b to role-play con
18、versations 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 VIII. Discussion Ask students what we should do to save the earth. Help students answer, turn off the
19、lights when you leave a room; stop riding in cars; stop using paper towels or napkins; recycle books and paper. IX. Reading 1. Read 2d and complete the chart. ProblemsSolving problems air pollution waste pollution wooden (木头的) chopsticks or plastic forks rubbish 2. Role-play the conversation. Interv
20、iewer: 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. Its good for health and it doesnt cost (花费) anything! Inte
21、rviewer: 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:
22、 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 points 1. This is turning beautiful places into ugly ones. turn into把变成 e.g. The icy ra
23、in 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! costv. 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?新电脑花了多少钱？ take, spend, pay Take buses instead of drivi
24、ng cars Recycle books and paper. (2) There are some animals are endangered. We should do something to protect the animals and the environment! III. Discussion (1) Have you ever seen a shark? (2) What do you know about sharks? IV. Reading (1) Sharks are endangered, read the passage and judge the sent
25、ences. Sharks fin（鱼鳍）soup is famous and expensive all around the world. We have to kill a whole shark to get a bowl of sharks fin soup. People cut off sharksfins and throw the sharks back into the ocean. Sharks are in the bottom of the food chain in the oceans ecosystem. WildAid and the WWF are envi
26、ronmental protection groups in China. Sharks fin s are good for health. (2) Complete the fact sheet in 3a. Where shark fin soup is popular Number of sharks caught and traded every year How much the numbers of some kinds of sharks have fallen in the last 20 to 30 years Two environmental groups which
27、are against “finning” V. Practice (3b) (1) Read the passage and dill 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 numbers drop, the oceans ecosystem
28、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 stop the sale of shark fins.
29、(2) Retell the passage according to the words below. sharks fin soup,in southern China each timecut offno longernot onlybut also at the topdropbe endangeredthe strongest around 70 millionfallen by over 90 percentWildAid and the WWF develop lawsscientific studies VI. Language points 1.Ashark can no l
30、onger swim and slowly dies. 鲨鱼不能再游泳然后慢慢死掉。 no longer 意思是“不再” e.g. Im no longer a student. 我不再是个学生了。 有两个短语和 no longer 同义，即 notany longer 和 notany more，但他们侧 重的方面不同。 no longer 和 notany longer 侧重时间。 e.g. He no longer lives here.= He doesnt live here any longer. 他不在这儿居住了。(一个时间以前他住在这儿，过了这个时间，他就离开 了。) nota
31、ny more 侧重侧重程度和数量 e.g. You can drink no more. = You cant drink any more. 你不能再喝了。(喝酒的量到了一定程度，不能再继续下去了。) 2. This method is not only cruel, but also harmful to the environment. 这种方法不但残忍而且对环境有害。 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。 e.g. 1) She not only plays well, but als
32、o writes music. 她不仅很会演奏，而且还会作曲。 2) Not only men but also women were chosen. 不仅仅是男的，女的也有被选中的。 若连接两个成分作主语，其谓语通常与靠近的主语保持一致。 e.g. Not only you but also he has to leave. 不只是你，他也得离开。 not only 放在句首，后接句子时要用倒装结构。 e.g. Not only had the poor man been fined, but also he had been sent to prison. 这个可怜的人不仅被罚款，而且还被
33、送进了监狱。 be harmful to对 有害 e.g. Smoking is harmful to the health. 吸烟有损健康。 Playing computer games much is 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. I looked at the top of his head,
34、his hair shiny and parted smoothly. 我看他的头顶, 头发光亮, 分得平滑。 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 danger 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。当表示数值的高或低时， number 要用 high 或 lo
35、w 修饰。 e.g. 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。 常与 number 搭配的动词有 grow, fall 等。 e.g. The number of families that own cars has been growing quickly recently. 近来拥有轿车的家庭数量增长很快。 5. Environment protection groups arou
36、nd the world, such as WildAid and the WWF, are teaching the public about “finning”. 世界各地的环境保护组织，如野生救援协会和世界自然基金会，都在教育公众 有关“猎翅”的行为。 1) 句中 fin 本为名词，指 “鱼鳍”。此句中的 finning 由动词化的 fin（割鲨鱼鳍 以获取鱼翅）的-ing 形式转化而成，指课文中所陈述的 “猎翅”这一行为。 2) WildAid 和 WWF 组织 WildAid（美国野生救援协会）是保护野生动物及栖息地环境的一个非盈利性的 机构， 1999 年注册成立， 其宗旨是保护及
37、救助世界范围内的野生动物； WWF （世 界自然基金会）英文全称为 World Wide Fund for Nature，成立于 1961 年，是享 有国际盛誉，全球最大的独立性非政府环境保护组织之一。 VII. Homework Write 5 measures to protect the environment. Section A3 (Grammar Focus-4c) I. Revision 1. 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. Translate th
38、ese 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 Focus Pay attention to the sentences. 1) Were trying to save 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 he
39、alth. 5) We should help save the sharks. 1. 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 now e.g. Look! The boy is crying. 2. used to do 与 be used to doing used 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.
40、表示习惯于做某事。 e.g. I used to get up at six oclock. Joe is used to drinking a cup of coffee every morning. 3. 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. Anew school was built last year. Our classroom is cleaned every day. 4. 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
41、开始 一直延续到现在并还可能持续下去的动作。 结构:has/have + 过去分词 标志词：already, yet, ever, never, since, for e.g. I havent finished my homework yet. 5. 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 n
42、ot。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 can 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. III. Practice 1. Work on 4a. Fill in the blanks with the correct forms of the verbs in brackets. Joe: _ you ever _ (take
43、) part in an environmental project ? Eric: Yes, I have. I _ (help) with a Clean-Up Day last year. It was _ (consider) the biggest clean-up project this city _ ever _ (have). Joe: How many people _ (take) part? Eric: I _ (think) more than 1,000 people _ (come) to help out. Joe: Thats fantastic! I gue
44、ss everyone in this city is _ (try) to improve the environment. Eric: Yes, we cant afford to _ (wait) any longer to take action! Learn some new words and expressions. 2. Work on 4b. Fill in the blanks with the appropriate modal verbs from the box. The words are: can,would,could,have to,should,must,m
45、ay/might People _ think that big things _ be done to save the earth. Many forget that saving the earth begins with small things. For example, you _ save electricity by turning off the lights when you leave a room. You _ also use reusable bags instead of plastic bags. I think its a great idea that yo
46、u now _ pay for plastic bags in some stores. And instead of driving to school or work, you _ ride your bike or walk. If its far, you _ take the bus. All these small things _ add up and become big things that _ improve the environment. Lets take action now! Learn some new words and expressions. 3. Wo
47、rk on 4c. Make a list of things that people can do to help the environment and discuss your list with your partner. use public transportation (n.交通运输); turn off the lights when you leave a room; use reusable bags instead of plastic bags; ride your bike or walk to school or work; stop using paper nap
48、kins; recycle books and paper 4. Discussion. A: I think that everyone should use public transportation. B: I disagree. Its difficult for parents with young children to use public transportation IV. Language points 1. We cant afford to wait any longer to take action! affordv. 承担得起；提供, 给予 afford to do
49、 sth. (常与 can, be ble to 连用) 买得起；有足够的 e.g. We cant afford to pay such a price.我们付不起这个价钱。 Dancing affords us pleasure.跳舞给我们带来快乐。 2. save electricity by turning off the lights when you leave a room. turning off关掉 e.g. Please turn the television off before you go to bed. 睡觉前请关掉电视。 拓展：turn 相关短语 turn aro
50、und转身 turn up调高（音量） turn down调低；拒绝 turn into变成；进入 turn on打开，发动 turn off关掉，关闭 turn out to be结果是 turn over移交 V. Homework Finish the exercises in the workbook. Section B 1 (1a2e) I. Revision Role-play this conversation. A: I think that everyone should use public transportation. B: I disagree. Its diffi
