新人教版九年级下册英语 Unit 13 Section A 3a-4c课件

1、英语教学课件系列九年级RJ全一册Unit 13Were trying to save the earth.Section A (3a-4c)新课导入There are some animals are endangered. We should do something to protect the animals and the environment! Save the earth!Save the animals!The zoos provide homes for many endangered animals. 1. Have you ever seen a shark（鲨鱼）?2.

2、 What do you know about sharks?Discuss with your partner:Where shark fin soup is popularNumber of sharks caughtand traded every yearHow government can helpTwo environmental groups against “finning”southern China70 milliondevelop laws to stop the sale of shark finsWildAid and the WWFRead the passage

3、about sharks and complete the fact sheet below.3aMany have heard of sharks fin soup. This famous and expensive dish is especially popular in southern China. But do you realize that youre killing a whole shark each time you enjoy a bowl of sharks fin soup? When people catch sharks, they cut off their

4、 fins and throw the shark back into the ocean. Without a fin, a shark can no longer swim and slowly dies. This method is not only cruel, but also harmful to the environment. Sharks are at the top of the food chain in the oceans ecosystem. If their numbers drop too low, it will bring danger to all oc

5、ean life. Many believe that sharks can never be endangered because they are the strongest in their food chain. But in fact, around 70 million sharks are caught and traded in this industry every year. The numbers of some kinds of sharks have fallen by over 90 percent in the last 20 to 30 years. Envir

6、onmental protection groups around the world,such as WildAid and the WWF, are teaching the public about “finning”.They have even asked governments to develop laws to stop the sale of sharks fins. So far, no scientific studies have shown that sharks fins are good for health, so why eat them? Help save

7、 the sharks！Read the passage again and fill in the blanks with the words in the box.so although if but when 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 b

8、e in danger.whenso3b3. 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.bu

9、tAlthoughifRetell the passage according to the words below.shark fin soup in southern China each time cut off no longer not onlybut 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 A shark can no longer s

10、wim 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. 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。1no longer和notany longer侧重时间。 e.g. He no longer lives here. = He doesnt 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。) notany more侧重程度和数量e.g

11、. 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。) 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。2e.g. She not only plays well, but also writes music. 她不但很会演奏，而且还会作曲。

12、 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. Smokin

13、g 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。 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. I looked at the top of his head, his hair shiny and parted smoothly. 我看他的头

14、顶, 头发闪亮且平滑的分 开。3He 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。 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。4e.g. In that country, the number of childre

15、n 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。 Environment protection groups around the world, such as WildAid and the WWF, are teaching

16、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。5 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，

17、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。Pay attention to the sentences.1. Were 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.Present progressiveused toPassive voiceP

18、resent perfectGrammar FocusModal verbs现在进行时: Present Progressive结构: be (am/is/are) + v.-ing标志词：Look, Listen, now, right nowe.g. Look! The boy is crying.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正在进行的动作。 What a fine day today! Look! What are they doing?Exerciseused to do与be used to doingused to do sth. 表示过去常常做某事

19、, 而现 在往往不做了, 后接动词原形。e.g. I used to get up at six oclock.be used to doing sth. 表示习惯于做某事e.g.Joe is used to drinking a cup of coffee every morning.Translation.1. 她过去常常周末和朋友闲逛。 She used to hang out with friends on weekends.2. 他习惯于每天晚上睡得很晚。 He is used to staying up.Exercise被动语态：Passive voice定义：表示主语是动作的承受

20、者，即行 为动作的对象的一种语态。结构：be + 过去分词e.g. A new school was built last year. Our classroom is cleaned every day.Translate the sentences by using Passive voice.1. 刚才一些老年人参观了博物馆。2. 工人们使用不同种类的机器工作。The museum was visited by some old people just now. Different kinds of machines are used to work by the workers. Ex

21、ercise结构: has/have + 过去分词标志词：already, yet, ever, never, since, fore.g. I havent finished my homework yet.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。 现在完成时: Present PerfectComplete the following sentences. I _ (be) in Beijing for two years.2. I _ never _ (hear) of that man before.3. To

22、m _ (work) there since two years ago.have beenhaveheard has workedExercise4. The twins _ (wash) the clothes for an hour.5. He _ (play) basketball since three years ago.6. How long _ Sally _ (sing) yet?have washedhas playedhassung1. 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 (coul

23、d), may (might), must, need, shall (should), will (would)等。情态动词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。 e.g. Ken can climb up the tress like a koala. Tracy could ride a bicycle when she was five years old. You mustnt play with fire. It is dangerous.Translation.1. 我们不能在教

24、室里吃东西。2. 首先你必须完成作业。3. 他现在不可能在家。4. 她一定知道这个问题的答案。ExerciseWe cant eat in the classroom. You must finish your homework first. He cant be at home now. She must know the answer to this question.Joe: _you ever _ (take) part in an environmental project?Ken: Yes, I have. I _ (help) with a Clean-Up Day last y

25、ear. It was_(consider) the biggest clean-up project this city ever _(have). Fill in the blanks with the correct forms of the verbs in brackets.Have taken helpedconsideredhad had4aJoe: How many people _ (take) part?Ken: I _ (think) more than 1,000 people _(come) to help out.Joe: Thats fantastic! I gu

26、ess everyone in this city is _ (try) to improve the environment.Ken: Yes, we cant affort to _ (wait) any longer to take action!tookthinkcametryingwait Fill in the blanks with the appropriate modal verbs from the box.can could would have to should must may/might4b People _ think that big things _ be

27、done. However, many forget 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 paper or reusable bags instead of plastic bags. mayshouldcouldwould Make a list fo thingsthat people can do to help the envir

28、onment and discuss your list with your partner.A: I think that everyone should use public transportation.B: I disagree. its diffcult for parents with young children to use public transportation.use public transportation.4cDiscussing.use public transportationtake your own shopping bags when go shoppi

29、ngreduce the use of air conditioners in summerturn off the lights when you leave the roomgrow more plants.A: I think that everyone should reduce the use of air conditioners in summer.B: I disagree. the summer is so hot, especially in sourth China. Without air-conditioners, people may not have the pa

30、tience to work.现在进行时（1）含义：表示正在发生或进行的动作。（2）基本结构：主语 + be + 现在分词（be 的形式随主语的变化而变化）（3）基本用法：表示现在正在进行的动作。特征：常常与now或具体的时间连用，有时句中会有感官动词来提示，或通过上下文来暗示。本单元复习现在进行时、used to句型、被动语态、现在完成时和情态动词。表示现阶段一直进行的动作。这类动词常常是延续性动词。常于at present, this week, these days等连用。表示主语的特征、性格、能力等现在完成时（1）含义：表示过去发生的动作对现在还有影响。（2）基本结构：主语 + hav

31、e / has + 过去分词（3）基本用法：表示过去发生的动作，但强调对现在产生影响。特征：不能与表示具体的时间状语连用。表示过去发生的动作或存在的状态一直延续到现在，还可能继续下去。常常与since, for, in the past + 时间名词，in the last +时间名词等时间状语连用，而且谓语动词要求是延续性动词。表示一种“经历或体验”，即可以表示经历过也可以是从来都没有经历过。被动语态初中阶段我们学习了七种被动结构，归纳如下：（1）一般现在时是被动语态：am / is / are + 过去分词（2）现在完成时的被动式： have / has + been + 过去分词（3）现

32、在进行时的被动式： am/ is/ are + being + 过去分词（4）一般过去时的被动式：was / were + 过去分词（5）过去进行时的被动式： was / were + being + 过去分词（6）过去完成时的被动式： had + been + 过去分词（7）一般将来时的被动式： will / be going to be+ 过去分词（8）含有情态动词的被动式：情态动词+be +动词的过去分词。情态动词情态动词表示说话人对某一动作或状态的态度，如认为“可能”、“应当”、“必要”等。情态动词本身有一定的意义，但不能单独作谓语，也没有人称和数的变化。后面一般跟动词原形。used

33、to 结构used to意为“过去常常做某事”，指的是过去的习惯性动作，目的在于与现在形成对照。used to是个情态动词，其中的to是不定式符号，后面跟动词原形。在美式英语中。它的疑问式是：Did 主语use to do sth？否定式是：主语didnt use。在英式英语中，它的疑问式应当是：Used 主语to sth？否定式应当是used not to或use（d）nt to。He used to stay up late. 他过去常熬到很晚used to 结构used to意为“过去常常做某事”，指的是过去的习惯性动作，目的在于与现在形成对照。used to是个情态动词，其中的to是不

34、定式符号，后面跟动词原形。在美式英语中：它的疑问式是：Did 主语use to do sth否定式是：主语didnt use在英式英语中： 它的疑问式应当是：Used 主语to sth否定式应当是used not to.I. 用所给词的适当形式填空。1. The old man used _ (be) a teacher. 2. We should _ (clean) the room every day. 3. Look! Tom _ (sleep) in his room. 4. Lots of trees _ (plant) on the hill every year. 5. He _

35、 (live) here for 20 years. to be clean is sleeping are planted has lived情态动词练习1.- _ you pass me a pen? Id like to write down the phone number. - Sure. Here it is. A.Can B.Need C.Might D.Must2. - May I go to the cinema, Mum? - Certainly, but you _ be back by 11 oclock. A.can B.may C.must D. need3. you _ worry about me. Its nothing serious. A.cant B.mustnt C. needn