1、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
2、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
3、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 h
4、ave 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
5、。 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
6、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,
7、 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 b
8、rackets. 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
9、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! affordv. 承担得起；提供, 给予 afford to do
10、 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
11、 R R e e UnitUnit 1313 WeWerere 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
