人教版九年级英语下册《We're trying to save the earth!》SectionB PPT课件下载(第2课时)，共51页。
Objectives
To master the key words and phrases:throw away, put sth. to good use, pull...down, gate, bottle, president,work, metal, bring... back...
To talk about saving the earth and improve speaking,listening and writing skills.
To realize the importance of protecting the earth and to do things to save the earth.
Warming up
Recycle books and paper.
Turn off the lights when you leave a room.
Language points
1.Rethink, Reuse, Recycle !
re-是最常用的前缀之一。它可以加在名词或动词前面，构成新的名词或动词。re-表示以下三方面的意义：
1)表示“回”或“向后”的意思。例如：return（回来）recall（回忆，召回）retract（缩回，取回）
2)表示“再”、“重新”、“重复”的意思。
例如：rethink（再思考）reuse（再运用）
restart（重新开始）recycle（再利用）
3)表示“相反”、“反对”的意思。
例如：rebel（反叛，谋反）reverse（反转，颠倒）resist（反抗，抵抗）
2. Do you often throw away things you don’t need anymore?
(1) throw away扔掉；抛弃
I never throw anything away.
我从来不扔任何东西。
⑵错过(机会等)，放过；未能很好利用(机会等)
Don’t throw away this opportunity.
不要错过这个机会。
⑶浪费(时间、金钱等)乱花(钱等)
It will be time and money thrown away.
这将是浪费时间和金钱。
3.Have you ever thought about how these things can actually be put to good use?
put sth. to good use 好好利用
e.g. Your creative talents can also be put to good use, if you can work up the energy.
如果你能让自己精力充沛起来，你的创作才能也能得到很好的发挥。
4. Nothing is a waste if you have a creative mind.
-ive是形容词后缀 一般表示有……的
create ﹢ -ive creative
Amy recently won a prize from the Help Save Our Planet Society.
recent ﹢-ly recently
形容词加ly变副词
5. She is a most unusual woman.
un-前缀，常加在形容词、副词、分词、动词和名词之前；第一，表示否定意义。第二，表示“反动作”，即“相反的动作”。例如：
uneconomic不经济的 uncomfortable不舒服
unending无尽的 unfortunate不幸的 unusual
不平常的 unkind不仁慈的 unbind解开，释放
uncover揭开……的盖子 unearth由地下掘出
unbutton 解开钮扣
Homework
Review the new words and expressions you’ve learned today.
Write a short passage about more things you can do for our world.
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