第13单元 第三课时 教案 上课时间： 年 月 日课 题Unit 13 We are trying to save the earth! Section A (3)课时安排共（5）课时课程标准 P15.（1）能听懂学习活动中连续的指令和问题，并做出适当的反应。（2）能参照范例写出或回复简单的问候和邀请。 学习目标1.学生通过图片展示及情境创设，90%能准确辨识单词。2.学生通过听听力1-3遍，85%能听懂听力材料大意并准确完成1c及1d的练习。3.学生通过小组讨论，80%能能树立环境危机意识。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 句型教学方法小组合作，情景创设 教学准备彩色粉笔，ppt课前作业回顾第一节课所学的内容。教学过程教学环节课堂合作交流二次备课（修改人： ）环来源:学优高考网gkstk节 一来源:学优高考网gkstk来源:学优高考网gkstkI. Revision来源:学优高考网gkstk1. Check if students know these phrases.来源:gkstk.Com课中作业 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2. Translation. 甚至河底都满是垃圾。 这个方法不仅残酷还对环境有害。 鲨鱼处于海洋食物链的顶部。 许多人相信鱼翅对健康有好处。环节二II. Grammar FocusPay 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.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 nowe.g. Look! The boy is crying.2. used to do与be used to doingused 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。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, fore.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.课中作业中考链接1. When Tim _ why he was late for school, he just kept silent. (2014 河南)A.was asked B. asked C. was asking D. is asked 2. Are you surprised at the ending of the movie? (2014 浙江宁波) No, because I _ the story. A.read B. will read C. have read D. was reading 3. Someone _ at the door. Can you open it? (2014 河北)A.knocks B. knocked C. is knocking D. was knocking 4. Children _ sit in the front seat of a car. Its too dangerous. (2014 重庆)A.need B. neednt C. must D. mustnt3. Someone _ at the door. Can you open it? (2014 河北)A.knocks B. knocked C. is knocking D. was knocking 4. Children _ sit in the front seat of a car. Its too dangerous. (2014 重庆)A.need B. neednt C. must D. mustnt5. Is that girl Susan？ It _ be her. She left for Beijing yesterday. (2013 福建福州)A.neednt B. cant C. mustntACCDB环节三III. Practice1. 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 Clean-Up Day last year. It was _ (consider) the biggest clean-up project this city _ ever _ (have). 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! 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 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 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 small things _ add up and become big things that _ improve the environment. Lets take action n