人教版九年级Unit 13 We're trying to save the earth!-Section A Grammar focus 4a—4c-ppt课件-(含教案)-公开课-(编号：103af).zip

Unit 13 Were trying to save the earth! Section A Grammar Focus-4c 1. 不同种类的污染不同种类的污染 2. 河底河底 3. 把垃圾扔到河里把垃圾扔到河里 4. 在在中起作用中起作用 different kinds of pollution the bottom of the river throw rubbish into the river play a part in I. Check if you know these phrases. 5. 在中国南部在中国南部 6. 对对有害有害 7. 在在顶部顶部 8. 海洋生态系统海洋生态系统 in southern China be harmful to/do harm to at the top of the oceans ecosystem II. Translate the sentences. 1. 甚至是河底都满是垃圾。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。这个方法不仅残酷还对环境有害。 Even the bottom of the river was full of rubbish. This method is not only cruel, but also harmful to the environment. 3. 鲨鱼处于海洋食物链的顶部。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。许多人相信鱼翅对健康有好处。 Sharks are at the top of the food chain in the oceans ecosystem. A lot of people believe that sharks fins are good for health. 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 progressive used to Passive voice Present perfect Modal verbs 现在进行时现在进行时: : Present Progressive 结构结构: be (am/is/are) + v.-ing 标志词：标志词：Look, Listen, now, right now e.g. Look! The boy is crying. 定义：定义：表示说话时表示说话时(瞬间瞬间)正在正在进行进行 的动作的动作, 也表示目前或现阶段也表示目前或现阶段正在正在发发 生的动作。生的动作。 What a fine day today! Look! What are they doing? used to do sth. 表示表示过去常常过去常常做某事做某事, 而现而现 在往往不做了在往往不做了, 后接动词原后接动词原 形。形。 be used to doing sth. 表示表示习惯于习惯于做某事做某事 e.g. I used to get up at six oclock. Joe is used to drinking a cup of coffee every morning. used to do与与be used to doing Translation. 1. 她过去常常周末和朋友闲逛。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。他习惯于每天晚上睡得很晚。 He is used to staying up late. 被动语态：被动语态：Passive voice 定义：定义：表示主语是动作的承受者。表示主语是动作的承受者。 结构：结构：be + 过去分词过去分词 e.g. Many students learn English.(主动语态) English is learnt by many students.(被动语态) Translate the sentences by using Passive voice. 1. 刚才一些老年人参观了博物馆。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. 结构结构: has/have + 过去分词过去分词 标志词：标志词：already, yet, ever, never, since, for e.g. I havent finished my homework yet. 定义：定义：表示动作已经完成表示动作已经完成, 但对现在造成或但对现在造成或 者表示从过去某时间开始一直延续到现在者表示从过去某时间开始一直延续到现在 并还可能持续下去的动作。并还可能持续下去的动作。即过去发生的即过去发生的 事与现在有关系事与现在有关系 。 现在完成时现在完成时: Present Perfect Complete the following sentences. 1. I _ (be) in Beijing for two years. 2. I _ never _ (hear) of that man before. 3. Tom _ (work) there since two years ago. have been haveheard has worked 4. The twins _ (wash) the clothes for an hour. 5. He _ (play) basketball since three years ago. 6. How long _ Lily _ (stay) here yet? have washed has played has stayed 1. 情态动词本身有一定的词义情态动词本身有一定的词义, 表示说表示说 话人的话人的情绪、态度或语气情绪、态度或语气, 但不能单独但不能单独 作谓语作谓语, 只能与其他动词构成谓语。常只能与其他动词构成谓语。常 见的有见的有: can (could), may (might), must, need, shall (should), will (would)等。等。 情态动词情态动词 2. 情态动词情态动词无人称和数的变化无人称和数的变化, 后接动词后接动词 原形。否定式是在情态动词后面加原形。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。个别情态动词有过去式形式, 可用来可用来 表达更加客气、委婉的语气。表达更加客气、委婉的语气。 e.g. Ken can climb up the trees like a monkey. Lucy could ride a bicycle when she was five years old. You mustnt play with fire. It is dangerous. Translation. 1. 我们不能在教室里吃东西。我们不能在教室里吃东西。 2. 首先你必须完成作业。首先你必须完成作业。 3. 他现在不可能在家。他现在不可能在家。 4. 她一定知道这个问题的答案。她一定知道这个问题的答案。 We 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. 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 Clean-Up Day last year. It was _ (consider) the biggest clean-up project this city _ ever _ (have). Have taken helped considered had had 参加参加 Joe: How many people _ (take) part? Eric: I _ (think) more than 1,000 people _ (come) to help out. Joe: Thats fantastic! I guess everyone in this city is _ (try) to improve the environment. Eric: Yes, we cant afford to _ (wait) any longer to take action! took think came trying wait v. 承担得起承担得起( (后果后果) ); 买得起买得起 We cant afford to wait any longer to take action! afford v. 承担得起承担得起; 提供提供, 给予给予 afford to do sth. (常与常与can, be able to 连用连用) 买得起买得起; 有足够的有足够的 e.g. We cant afford to pay such a price. 我们付不起这个价钱。我们付不起这个价钱。 Dancing affords us pleasure. 跳舞给我们带来快乐。跳舞给我们带来快乐。 4b Fill in the blanks with the modal verbs from the box. People _ think that big things _ be done to save the earth. Many forget that saving the earth begins with small things. For example, you _ save may/might must can/could can would could have to should must may/ might electricity by turning off the lights when you leave a room. You _ also use reusable bags instead of plastic bags. I think its 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 its far, you _ take the bus. All these can/could have to can/should can/could 关掉关掉adj.可重复使用的可重复使用的 付费付费;付出代价付出代价 small things _ add up and become big things that _ improve the environment. Lets take action now! could/can would/can/could 采取行动采取行动 4c Make a list of things that people can do to help the environment and discuss your list with your partner. use public transportation (n.交通运输交通运输); turn off the lights when you leave a room; use reusable bags instead of plastic bags; ride your bike or walk to school or work; stop using paper napkins(餐巾纸餐巾纸); recycle books and paper Discuss your list of things in 4c in pairs. Then write an article to protect the environment. I think that everyone should use public transportation. I disagree. Its difficult for parents with young children to use public transportation Protect the earths environment - the homeland of all mankind. 保护地球环境保护地球环境人类共有的家园人类共有的家园 。 教学目标 1. 语言知识目标 基本词汇： cruel. harmful, chain, ecosystem, . 基本词组： take part in, turn off, take action, throw away, 基本句型： No scientific studies have showed that shark fins are good for health. We cant afford to wait any longer to take action! 2. 技能目标: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 教学重点 （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。 教学方法 Practice 教具准备 PPT 教 学 内 容 和 过 程教学改进措施 I.I. Review.Review. 1.Greeting as usual. 2.Revise.Check if you know these phrases. 不同种类的污染 河底 把垃圾扔到河里 在中起作用 在中国南部 对有害 在顶部 海洋生态系统 3. Translate the sentences. 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.II. GrammarGrammar FocusFocus Pay attention to the sentences. Let students read, translate and do some exercises. 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. 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) + v.-ing 标志词：Look, Listen, now, right now e.g. 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。 be used to doing sth. 表示习惯于做某事。 e.g. I used to get up at six oclock. 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 e.g. 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 e.g. I havent 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, 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. III.III. PracticePractice 1. Work on 4a. Fill in the blanks with the correct forms of the verbs in brackets. Let students read, translate and say out the reasons. 2. Work on 4b. Fill in the blanks with the appropriate modal verbs from the box. Learn some new words and expressions. Let students read, translate and say out the reasons. 3. Work on 4c. Make a list of things that people can do to help the environment 4. Discussion. A: I think that everyone should use public transportation. B: I disagree. Its difficult for parents with young children to use public transportation IV.IV. LanguageLanguage pointspoints We cant afford to wait any longer to take action! afford v. 承担得起；提供, 给予 afford to do sth. (常与 can, be able to 连用) 买得起；有足够的 e.g. We cant afford to pay such a price. Dancing affords us pleasure. V.V. HomeworkHomework Discuss your list of things that people can do to help the environment. And write an article to show in what way we students can protect the environment. 板 书 设 计 n n s s R R e e UnitUnit 1313 WereWere tryingtrying toto savesave thethe earth.earth. 1.现在进行时: Present Progressive 结构: be (am/is/are) + v.-ing 标志词：Look, Listen, now, right now 2现在完成时: Present Perfect 结构: has/have + 过去分词 标志词：already, yet, ever, never, since, for 3.used to do 与 be used to doing 4.被动语态：Passive voice 结构：be + 过去分词 教 学 反 思