【正文】 But we can do other things. For example, we can go to school on foot. B: You are right. We should turn off the lights when we leave the room. II. Leading in (1) Tell students we should do these things to protect the environment. Turn off the lights when you leave a room。 Dancing affords us pleasure. 跳舞給我們帶來快樂。 stop using paper napkins。 use reusable bags instead of plastic bags。 . Ken can climb up the tress like a koala. Tracy could ride a bicycle when she was five years old. You mustn’t 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) part in an environmental project ? Eric: Yes, I have. I ______ (help) with a CleanUp Day last year. It was _________ (consider) the biggest cleanup project this city ____ ever ____ (have). Joe: How many people ____ (take) part? Eric: I _______ (think) more than 1,000 people ______ (e) to help out. Joe: That’s fantastic! I guess everyone in this city is ______ (try) to improve the environment. Eric: Yes, we can’t 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, may/might People __________ think that big things ______ be done to save the earth. Many fet 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 it’s a great idea that you now ______ pay for plastic bags in some stores. And instead of driving to school or work, you __________ ride your bike or walk. If it’s far, you __________ take the bus. All these small things ______ add up and bee big things that ______ improve the environment. Let’s take action now! Learn some new words and expressions. 3. Work 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 ( )。否定式是在情態(tài)動(dòng)詞后面加 not。常見的有： can (could), may (might), must, need, shall (should), will (would)等。 或者表示從過去某一時(shí)間開始一直延續(xù)到現(xiàn)在并還可能持續(xù)下去的動(dòng)作。 . I used to get up at six o’clock. Joe is used to drinking a cup of coffee every morning. 3. 被動(dòng)語態(tài)： Passive voice 定義：表示主語是動(dòng)作的承受者，即行為動(dòng)作的對象的一種語態(tài)。 結(jié)構(gòu) : be (am/is/ are) + 標(biāo)志詞： Look, Listen, now, right now… . Look! The boy is crying. 2. used to do 與 be used to doing used to do sth. 表示過去常常做某事 , 而現(xiàn)在往往不做了 , 后接動(dòng)詞原形。 ④ 許多人相信魚翅對健康有好處。 ② 這個(gè)方法不僅殘酷還對環(huán)境有害。 2) WildAid 和 WWF 組織 WildAid（美國野生救援協(xié)會(huì)）是保護(hù)野生動(dòng)物及棲息地環(huán)境的一個(gè)非盈利性的機(jī)構(gòu)， 1999年注冊成立，其宗旨是保護(hù)及救助世界范圍內(nèi)的野生動(dòng)物； WWF（世界自然基金會(huì)）英文全稱為 World Wide Fund for Nature，成立于 1961 年，是享有國際盛譽(yù)，全球最大的獨(dú)立性非政府環(huán)境保護(hù)組織之一。 1) 句中 fin 本為名詞，指 “魚鰭 ”。 . The number of families that own cars has been growing quickly recently. 近來擁有轎車的家庭 數(shù)量增長很快。 . In that country, the number of children going to school is higher in cities than in towns and village. 在那個(gè)國家，城市兒童入學(xué)人數(shù)比鄉(xiāng)鎮(zhèn)及農(nóng)村要高。 此句復(fù)數(shù)形式的 number 表達(dá)全海洋中鯊魚的總量。 He shouted at the top of his voice in order that he might be heard. 他盡力大聲叫喊 , 以便別人能聽見。 at the top of 在 ...最高地位 。 Playing puter games much is harmful to students. 電腦游戲玩太多對學(xué)生有害。 . Not only had the poor man been fined, but also he had been sent to prison. 這個(gè)可憐的人不僅被罰款，而且還被送進(jìn)了監(jiān)獄。 . Not only you but also he has to leave. 不只是你，他 也得離開。 2) Not only men but also women were chosen. 不僅僅是男的，女的也有被選中的。 其中的also 有時(shí)可以省略。 ) 2. This method is not only cruel, but also harmful to the environment. 這種方法不但殘忍而且對環(huán)境有害。 ) not…any more 側(cè)重側(cè)重程度和數(shù)量 . You can drink no more. = You can’t drink any more. 你不能再喝了。 . He no longer lives here.= He doesn’t live here any longer. 他不在這兒居住了。 有兩個(gè)短語和 no longer 同義 ， 即 not…any longer 和 not…any more ， 但他們側(cè)重的方面不同。 ② Take buses instead of driving cars ③ 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 sentences. ① Shark’s fin（魚鰭） soup is famous and expensive all around the world. ② We have to kill a whole shark to get a bowl of shark’s fin soup. ③ People cut off sharks’ fins and throw the sharks back into the ocean. ④ Sharks are in the bottom of the food chain in the ocean’s ecosystem. ⑤ WildAid and the WWF are environmental protection groups in China. ⑥ Shark’s 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 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 ocean’s 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 stop the sale of shark fins. (2) Retell the passage according to the words below. shark’s fin soup, in southern China each time cut off no longer not only…but also… at the top drop be endangered the st