九年级下册英语人教版课件 Unit 13　Section A (3a-3b)

1、Unit 13 Were trying to save the earth,Section A 2 3a-3b,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 riding,I never take wooden chop

2、sticks or plastic forks when I buy takeaway food,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,There are some animals which are endangered. We should do some

3、thing to protect the animals and the environment,Save the earth! Save the animals,The zoos provide homes for many endangered animals,1. What do you know about sharks(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,southern China,70 m

4、illion,develop laws to stop the sale of shark fins,WildAid and the WWF,3a,Read the passage about sharks and complete the fact sheet below,Retell the passage according to the words below,3b,Read the passage again and fill in the blanks with the words in the box,Many people do not realize they are kil

5、ling 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,3. Many think that sharks are too strong to be endangered, _ they are wrong. 4. _ there are no scientific studies to support t

6、his, a lot of people believe that shark fins are good for health,but,Although,5. Sharks may disappear one day _ we do not do something to stop the sale of shark fins,if,1. Without a fin, a shark can no longer swim and slowly dies. 没有鱼鳍，鲨鱼不能再游泳然后慢慢死去,no longer 不再 = notany longer/ not any more,no long

7、er通常位于实义动词之前，be动词、助动词或情态动词之后 。 not . 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 doesnt like dancing any longer/ any more,Joe no longer likes dancing,2. This method is not only c

8、ruel, but also harmful to the environment. 这种方法不但残忍而且对环境有害,not onlybut also 不仅而且 用于连接两个表示并列关系的成分，着重强调后者，其中的also有时可以省略,e.g. She not only plays well, but also writes music. Not only does my sister sing well, but she dances well. Not only the students but also the teacher is working hard,not only置于句首时，

9、常用_语序。 not only. but also.连接两个主语时，谓语动词需与_ (前面/后面)那个主语在人称和数上保持一致，就近原则,倒装,后面,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. (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 swi

10、m,Not only but also,does he like,but,3) The twins were late this morning. Sam was late this morning, too. Not only the twins _ _ Sam _ late this morning. _ _ Sam but also the twins _ late this morning,was,Not only,were,but also,be harmful to 对有害 be bad for 对有害 e.g. Smoking is harmful to the health.

11、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,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 num

12、bers 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,In that country, the number of children going to school is higher in cities than in towns and villages. 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low,根据句意，从方框中选择恰当的单词填空，有的需要变换形式，每 词限用一次。 1. The king in the story was said to be very _. 2. When we talk about _, we always feel afraid of them,shark, ecosystem, law, cruel, science,cruel,sharks,Exercises,3. I hope to study _ after I enter the university. 4. They