Unit 13 We’re trying to save the earth!
Section A (3a~3b)
教学目标
【知识与技能】
1.掌握句型： So far, no scientific studies have showed that shark fins are good for health.
2. 掌握本课单词和短语： cruel, harmful, shark, fin, chain, ecosystem, industry, law, scientific, be harmful to, at the top of
3. 掌握本课语法：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。
【情感、态度与价值观】
有环境危机意识，学会关注环境保护环境。
教学重难点
【教学重点】
掌握句型：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。 【教学难点】
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。
教学过程
Step 1 Lead in
(1) Teacher tells students the earth is badly polluted. What should we do to save the earth? Let’s take action. For example:
①Turn off the lights when you leave a room; ②Take buses instead of driving cars ③Recycle books and paper.
(2) There are some animals are endangered. We should do something to protect the animals and the environment! Step 2 Reading
Sharks are endangered, read the passage and judge the sentences.
①Shark’s fin（鱼鳍）soup is famous and expensive all around the world. ②We have to kill a whole shark to get a bowl of shark’s fin soup. ③People cut off sharks’ fins and throw the sharks back into the ocean. ④Sharks are in the bottom of the food chain in the ocean’s ecosystem. ⑤WildAid and the WWF are environmental protection groups in China. ⑥Shark’s fin s are good for health. Complete the fact sheet in 3a.
九年级教学资料
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” Step 3 Practice
(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 strongest around 70 million fallen by over 90 percent WildAid and the WWF develop laws scientific studies Step 4 Language points
1. A shark can 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”
e.g. I’m no longer a student. 我不再是个学生了。 有两个短语和no longer同义，即not…any longer和not…any more，但他们侧重的方面不同。 no longer和not…any longer侧重时间。
e.g. He no longer lives here.= He doesn’t 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。)
not…any more侧重侧重程度和数量
e.g. You can drink no more. = You can’t 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。)
九年级教学资料
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 only…but 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 also 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 ocean’s 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。
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 around 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，其宗旨是保护及救助世界范围内的野生动物；WWF（世界自然基金会）英文
九年级教学资料
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。
课堂作业
Write 5 measures to protect the environment.
教学反思
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