20xx秋人教版英语九年级unit13we’retryingtosavetheearthword全单元教案

20xx秋人教版英语九年级unit13we’retryingtosavetheearthword全单元教案内容摘要：

rop be endangered the strongest around 70 million fallen by over 90 percent WildAid and the WWF develop laws scientific studies VI. 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 ” . 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。 . 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 . 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。 ) 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。 . 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。 . 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。 . 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 . Smoking is harmful to the health. 吸烟有损健康。 Playing puter 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 ) . 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。 . 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。 . 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。 VII. Homework Write 5 measures to protect the environment. Section A 3 (Grammar Focus4c) I. Revision 1. Check if you know these phrases. ① 不同种类的污染 ② 河底 ③ 把垃圾扔到河里 ④ 在 … 中起作用 ⑤ 在中国南部 ⑥ 对 …… 有害 ⑦ 在 …… 顶部 ⑧ 海洋生态系统 2. Translate these sentences into English. ① 甚至是河底都满是垃圾。 ② 这个方法不仅残酷还对环境有害。 ③ 鲨鱼处于海 洋食物链的顶部。 ④ 许多人相信鱼翅对健康有好处。 II. Grammar Focus Pay attention to the sentences. 1) We’re trying to save the earth. 2) The river used to be so clean. 3) The air is badly polluted. 4) No scientific studies have shown that shark fins are good for health. 5) We should help save the sharks. 1. 现在进行时 : Present Progressive 定义：表示说话时（瞬间）正在进行的动作，也表示目前或现阶段一直进行的动作。 结构 : be (am/is/ are) + 标志词： Look, Listen, now, right now… . Look! The boy is crying. 2. used to do 与 be used to doing used to do sth. 表示过去常常做某事 , 而现在往往不做了 , 后接动词原形。 be used to doing sth. 表示习惯于做某事。 . I used to get up at six o’clock. Joe is used to drinking a cup of coffee every morning. 3. 被动语态： Passive voice 定义：表示主语是动作的承受者，即行为动作的对象的一种语态。 结构： be + 过去分词 . A new school was built last year. Our classroom is cleaned every day. 4. 现在完成时 : Present Perfect 定义：表示动作已经完成 , 但对现在造成影响。 或者表示从过去某一时间开始一直延续到现在并还可能持续下去的动作。 结构 : has/have + 过去分词 标志词： already, yet, ever, never, since, for… . I haven’t finished my homework yet. 5. 情态动词 1) 情态动词本身有一定的词义，表示说话人的情绪、态度或语气 ，但不能单独作谓语，只能与其他动词构成谓语。 常见的有： can (could), may (might), must, need, shall (should), will (would)等。 2) 情态动词无人称和数的变化 , 后接动词原形。 否定式是在情态动词后面加 not。 个别情态动词有过去式形式 , 可用来表达更加客气、委婉的语气。 . 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.。