人教版九年级英语下册《We're trying to save the earth!》SectionA PPT课件下载(第1课时)，共44页。
Objectives
To talk about air pollution, water pollution and noise pollution.
To think about ways of protecting the environment.
To learn to use the sentence patterns used to...but now should do sth.
Listen again and answer the following questions.
What does Tony want to do later this afternoon?
He wants to go swimming with Mark in the river later this afternoon.
Why doesn’t Mark want to go with Tony?
Because the river was really dirty. Even the bottom of the river was full of rubbish, and there were no more fish for fishermen to catch.
How was the river in the past?
It used to be so clean. It has been the nicest river in this town.
Language points
1.We’re trying to save the earth!
我们正在竭尽全力拯救地球!
try to do = try one’s best to do 努力去做某事
e.g. We’ll try to finish the work in a week.
我们将努力在一周内完成这项工作。
2.Here are some words related to different kinds of pollution.
be related to 与……有关
e.g. Is the driver related to the accident?
司机和这起事故有关吗？
3. Even the bottom of the river was full of rubbish.
Yes, but people are throwing litter into the river.
litter和rubbish都可指“垃圾”，用作不可数名词。
litter指“（室内或公共场所）乱扔的废物（纸屑、不要的包装纸、废瓶等）”还可回收。
rubbish指“没用的东西（被扔或将要丢弃的无用的东西）”不可回收。
4.Everyone in this town should play a part in cleaning it up!
play a part in 在……方面起作用
e.g. A good diet plays a large part in helping people live longer.
健康的饮食在帮助人们长寿方面起着非常大的作用。
5. It’s good for health and it doesn’t cost anything!
cost v. 花费；使付出，指花费金钱，主语通常是物。cost的过去式和过去分词均为cost。
e.g. The new shirt cost Mr Wang 200 yuan.
王先生花了200元买了新衬衫。
How much does the new computer cost?
新电脑花了多少钱？
Homework
Write a short passage about how to protect our environment.
Preview the new words and expressions.
Preview the article on page 99.
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关键词：We're trying to save the earth! PPT课件免费下载，.PPTX格式；