1、本网站免费注册后即可以下载，点击开通VIP会员可无限免费下载！
2、资料一般为word或PPT文档。建议使用IE9以上浏览器或360、谷歌、火狐浏览器浏览本站。
3、有任何下载问题，请联系微信客服。
扫描下方二维码，添加微信客服
【学习过程】
一：热身导入：观看杰克逊的MV“Earth song ”& 师生对话
1. What can trees do for us?
2. What will our world be like without trees?
二：自主学习&质疑
1.Listen to 1a and choose the best answer.
2.Read 1a and complete trees’ functions.
3.Do you know how sandstorms come into being?Number the pictures
三：互动释疑
Work in pairs and describe the pictures with the words given.
四：合作探究
Work in gorups and speak out.
1.Are trees important to us?why (trees’ functions)?
2.What will our world be like without trees?
3.What can we do to protect the earth? (We should… We shouldn’t…)
五：反馈训练
Exercises: Fill in the blanks with the correct forms.
be harmful to, as a result， stop\prevent … from doing,
change into， do something ，blow…away， cut down,.
1. People have cut down such a large mumber of trees that the land______________ desert.
2.There are fewer trees left,so the wind always___ the earth____.
3.Air pollution has become a serious problem,so we must____________to reduce it.
4.We should try our best to ____people____cutting down trees.
5.In the future,human beings can protect the trees well.___________,animals will live a happy life in the forest.
6. ____________trees is bad behavor(行为).
7. Reading in the sun_____________your eyes.
六 内容小结：
We have learned:Phrases:
The importance of trees(trees functions):
We have known：