1、 Unit 13 were trying to save the earth! SectionA(3a 3b) 一一 . .教学目标教学目标 1 .帮助学生了解鲨鱼所处的生活环境及所面临的问题。 2 .通过多媒体展示及其课件设计，让学生在愉悦的环境 下轻松的掌握本课时重要的语言知识点。 二二 . .教学内容教学内容 1. 读懂有关濒危生物鲨鱼的短文。 2 .总结短文中部分短语和知识点。 三三. . 教学重难点教学重难点 1.读懂有关濒危生物鲨鱼的短文 2.总结短文中部分短语和知识点。 四四 . .教学过程教学过程 StepStep 1 1：Greeting . StepStep 2 2：向学生
2、展示一则公益广告，让学生通过广告内容告 诉大家广告主题，由广告主题引入今天新课。 StepStep 3 3：Sharks are at the top of the food chain in the oceans ecosystem .today we will learn the passage and learn about sharks . 让学生看课本内容听短文,掌握文章大意,回答 4 个问题. 1.Where shark fin soup is popular 2.Number of sharks caught and traded every year 3.How governm
3、ents can help 4.Twoenvironmentalgroupswhichareagainst “finning” StepStep 4 4 ：Sharks are endangered, read the passage and judge the sentences Read the first paragraph 1. Sharks fin（鱼鳍）soup is famous and expensive allaround the world. 2.We have to kill a whole shark to get abowl of sharks fin soup. R
4、ead the second paragraph 1 . People cut off sharks fins and throw the sharks back into the ocean 2 . Sharks are in the bottom of the food chain in the oceans ecosystem. Read the third paragraph 1 . WildAid and the WWF are environmentalprotection groups in China. 2 .Sharks fins are good for health. S
5、tepStep 5 5 ：和学生一起看课文内容,讲解短文里面语言知识 点. 1 . A shark can no longer swim and slowlydies. 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
6、 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。) notany more 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 alsoharmful 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 a
7、lso 有 时可以省略。 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。 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。 3. Sharks are at the top of th
8、e 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, his hair shiny and parted smoothly. 我看他的头顶, 头发闪亮且平滑的分开。 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
9、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。 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
10、。 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。 StepStep 6 6 ：完成教学任务 3b 的内容 ,并和学生一起复习 so althoughifbutwhen用法. StepStep 7 7：Let students talk about the question :We know there are many animals are endangered ,What we should do ? We should do something to protect the animals and envionment . Save the earth !save the animals ! StepStep 8 8：Homework Write acompositioncall onpeopletoprotect animals
