《Protect the Earth》PPT(第二课时)
第一部分内容：Introduce
I can use ___ to ____.
We should _______.
We should not _______.
... ... ...
Protect the EarthPPT，第二部分内容：Words
use… to…
“use + 名词 + to + 动词原形”意思是用某物做某种东西。
to后接动词原形。
常用短语： protect the earth 保护地球
eg：She always uses too much water to clean things.
她总是用太多的水来清洗东西。
小练习：In the past, we often ____(use) wood to make fire..
Use··· to···扩展
(1)used to表示过去常常做某事。
eg：I used to play football after school。
过去我常常在放学后踢球。
(2)be used to + doing： “习惯于···”,to是介词,后需加名词或动名词。
eg：Sarah is used to taking a walk。
Sarah习惯于散步了。
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Protect the EarthPPT，第三部分内容：Expand
can作情态动词用法
(1)(表示能力)能···;会···
eg：She can drive，but she can’t ride a bicycle.
他能开车,但是不会骑自行车。
(2)(表示可能、许可)能够···;可以···
eg：You can’t park your car in this street.
你不可以在这条街上停车。
could/be able to 区别
could表示“原来具备某种能力,现在没有这种能力了”。
但was/were able to则表示过去成功地做成了某事。
eg：I could swim all the way across the lake，but I can’t now.
我原来能游过这个湖,但现在不能了。
The fire spread through the hotel very quickly but everyone was able to get out.
大火很快蔓延了整个旅馆,但全体人员都脱离了危险。
... ... ...
Protect the EarthPPT，第四部分内容：Exercise
( )1.The oil is________ .
A. use B. reuse C. useful
( )2.To keep the air clean, don’t ________to work every day.
A. walk B. run C. drive
( )3.We often use______to clean things.
A. coal B. oil C. water
( )4.There______ some paper on the desk.
A. has B. is C. are
( )5.People cut down ______trees every day.
A. lot of B. many C. much
( )6.We can use paper______ a toy plane.
A. make B. making C. to make
... ... ...
Protect the EarthPPT，第五部分内容：Homework
Collect more examples of environmental damage, write a small report，report showing in the class.
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