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1、Unit 13 Were trying to save the earth.,Period 2 Section A 3a-3b,Revision,Translation.,1.甚至河底都满是垃圾。 2.这个镇上的每个人都应该参与清扫。,Even the bottom of the river was full of rubbish.,Everyone in this town should play a part in cleaning it up.,3.骑自行车有其它的优点。 4.我买外卖食品从来不拿木筷子和塑料叉子。,There are other advantages of bike r
2、iding.,I never take wooden chopsticks or plastic forks when I buy takeaway food.,Revision,Warm-up,The earth is badly polluted. What should we do to save the earth?,Lets take action (采取行动),Turn off the lights when you leave a room.,Recycle books and paper.,Take buses instead of driving cars.,Warm-up,
3、Some animals are endangered. We should do something to protect the animals and the environment!,Save the earth! Save the animals!,Warm-up,The zoos provide homes for many endangered animals.,Warm-up,Lead-in,1. What do you know about sharks(鲨鱼)? 2. Do you think sharks can be endangered? Why?,3. What d
4、o you think might cause a fall in the number of sharks?,Lead-in,Reading,southern China,70 million,over 90 percent,WildAid and the WWF,3a,Read the passage about sharks and complete the fact sheet below.,Retell the passage according to the words below.,Reading,3b,Read the passage again and fill in the
5、 blanks with the words in the box.,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 will be in danger.,when,so,Reading,3. Many think that sharks are too strong to
6、 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.,but,Although,if,adj. 科学上的，科学的,Reading,Explanation,1. A shark c
7、an no longer swim and slowly dies. 鲨鱼不能再游泳然后慢慢死掉。,no longer意思是“不再”, 相当于not any longer。 e.g. Mr. Brown no longer works here. 布朗先生不再在这里工作了。,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。,Explanat
8、ion,e.g. She not only plays well, but also writes music. 她不但很会演奏，而且还会作曲。 Not only men but also women were chosen. 不仅仅是男的，女的也有被选中的。,Explanation,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
9、 also he had been sent to prison. 这个可怜的人不仅被罚款，而且还被送进了监狱。,Explanation,be harmful to 对有害 e.g. Smoking is harmful to the health. 吸烟有害健康。 Playing computer games much is harmful to students. 电脑游戏玩太多对学生有害。,Explanation,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
10、 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。,Explanation,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numbers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low修饰。,Expla
11、nation,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。,Explanation,Homework,Write 5 measures to protect the environment.,Thank you！,Goodbye!,
