外研版九年級英語上冊《Repeat these three words daily:reduce reuse and recycle》Save our world PPT免費課件，共26頁。
新課導(dǎo)入
Language practice
Reuse means “use again”.
Though pollution is heavy now, I don’t think it’s hopeless.
新課講解
Make new words. Join the parts of words in Box A with the words in Box B. You need to use some of the parts more than once.
We shouldn’t use disposable food box or disposable chopsticks.
These are some bowls and spoons made of china.
Someone threw an empty bottle in a river.
There are three rubbish bins for recycling, so please divide the waste before you throw things into them.
Possible answers:
It is better to use china cups and bowls because they can be used many times.
It is better to divide the waste into things to recycle and things to throw away.
It is necessary to use less plastic bags.
You should make a recycling policy for your classmates and yourself.
Language points
It is better to use china cups and bowls...
用瓷杯和瓷碗更好…… it在這里作形式主語。
作不定式的形式主語
eg：It's not easy to get him to change his mind. 讓他改變主意不容易。
作that引導(dǎo)的從句的形式主語
eg：It is obvious that we can't go on like this.我們顯然不能像這樣繼續(xù)了
作whether, when, what等引導(dǎo)的句子的形式主語
eg：It doesn't matter whether you go or not. 你去不去沒關(guān)系。
作動名詞的形式主語
eg：It was nice seeing you. 看見你真好。
when shopping 當(dāng)買東西時
when＋doing，when為連詞，由于主句和從句主語相同，故可省略從句中的主語和be動詞。
eg：When waiting for the train, he always plays his mobile games.
當(dāng)他等火車時，他總是玩他的手機(jī)游戲。
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