约1900字。

　　Unit 2 Saving the world
　　Topic 1 There are many kinds of pollution around us.
　　一、教学课题：Topic 1 There are many kinds of pollution around us.
　　二、教学内容：
　　1. Master some new words and useful expressions：
　　Produce, chest, breathe, manage, waste, cancer, influence, look, several, secretary, relation, fisherman, president, dead, rabbit
　　2. Learn the present perfect tense with for/since:
　　— How long have you been like this?
　　— I have been like this since last month.
　　3. Learn something about some kinds of pollution:
　　（1）The large population has caused many problems.
　　（2）Air pollution makes people sick.
　　（3）Light pollution is harmful to our eyes.
　　（4）Litter influences the loor cities.
　　4. Let students know that pollution is really a serious problem.
　　5. Talt the environment in the past, at present, and how to protect the environment.
　　6. Let the students know something about the noise pollution in order to make life comfortable and pleasant.
　　三、教学目标:
　　1. Learn the present perfect tense with since.
　　2. Learn how to express complaint.
　　3. Learn the present perfect tense with for.
　　4. Realize the harm of water pollution and enhance the students’ awareness of the importance of protecting the water resources.
　　5. Understand the sentences which express blame.
　　6. Realize the harm of noise pollution.
　　四、教学重点：
　　1. Learn the present perfect tense with since.
　　2. Learn how to express complaint.
　　3. Learn the present perfect tense with for.
　　4. Realize the harm of water pollution and enhance the students’ awareness of the importance of protecting the water resources
　　五、教学难点：
　　1. Learn the present perfect tense with since.
　　2. Learn how to express complaint.
　　3. Learn the present perfect tense with for.
　　六、教学准备： 课前让学生准备一些有关各种污染的一些图片。
　　七、教具：教学挂图, 录音机, 简笔画, 单词卡片.
　　八、课型：New lesson
　　九、教学过程：
　　活动设计 设计意图
　　水污染大调查 通过学生对水污染的现状调查，了解水污染的情况。
　　污染知多少 通过让学生讨论的形式，说说知道的污染的种类。
　　声音污染的害处 通过学生小组汇报的形式，让学生说说噪声污染的危害。
　　如何减少污染 通过学生比赛的方式,让学生说说所知道的减少污染的方法。