人教版九年級英語下冊《We're trying to save the earth!》SectionB PPT課件下載(第2課時)，共51頁。
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-是最常用的前綴之一。它可以加在名詞或動詞前面，構成新的名詞或動詞。re-表示以下三方面的意義：
1)表示“回”或“向后”的意思。例如：return（回來）recall（回憶，召回）retract（縮回，取回）
2)表示“再”、“重新”、“重復”的意思。
例如：rethink（再思考）reuse（再運用）
restart（重新開始）recycle（再利用）
3)表示“相反”、“反對”的意思。
例如：rebel（反叛，謀反）reverse（反轉，顛倒）resist（反抗，抵抗）
2. Do you often throw away things you don’t need anymore?
(1) throw away扔掉；拋棄
I never throw anything away.
我從來不扔任何東西。
⑵錯過(機會等)，放過；未能很好利用(機會等)
Don’t throw away this opportunity.
不要錯過這個機會。
⑶浪費(時間、金錢等)亂花(錢等)
It will be time and money thrown away.
這將是浪費時間和金錢。
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.
如果你能讓自己精力充沛起來，你的創作才能也能得到很好的發揮。
4. Nothing is a waste if you have a creative mind.
-ive是形容詞后綴 一般表示有……的
create ﹢ -ive creative
Amy recently won a prize from the Help Save Our Planet Society.
recent ﹢-ly recently
形容詞加ly變副詞
5. She is a most unusual woman.
un-前綴，常加在形容詞、副詞、分詞、動詞和名詞之前；第一，表示否定意義。第二，表示“反動作”，即“相反的動作”。例如：
uneconomic不經濟的 uncomfortable不舒服
unending無盡的 unfortunate不幸的 unusual
不平常的 unkind不仁慈的 unbind解開，釋放
uncover揭開……的蓋子 unearth由地下掘出
unbutton 解開鈕扣
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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關鍵詞：We're trying to save the earth! PPT課件免費下載，.PPTX格式；
