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一、导入新课
教师展示世界地图，和学生进行问答。
T：Look! This is a map of the world.
Who know? What do the bule parts stand for?
Ss:Blue parts stand for oceans and seas.
T:What do the green parts stand for?
Ss:Green parts stand for trees and grass.
T: Well.Our earth is very beautiful, isn’t it?
Ss:Yes.
T:But sometimes we do bad things to do.
For example……
此时呈现第3张幻灯片，让学生复习巩固 pick flowers。
make the air dirty 等四会短语，也由此进入新课内容。
二、新课展示
1、教师朗读课文，让学生带着问题听课文，了解课文大意。
Question 1：What bad things do we do to our earth?
Question 2: What should we do?
2、学生自读课文，从文中找出答案，并做回答，不恰当处教师予以引导。
3、分段讲解课文，重点讲授there be 句型和 too many、too much并做巩固训练。
4、学生再读课文，做P20练习：Read again and tick or cross:
( ) 1 . There are mountains , trees and flowers on the earth .
( ) 2. We live on the earth with many animals .
( ) 3. We should cut down more trees .
( ) 4. We make all the water dirty .
( ) 5. We should care for the animals .
三、回顾本课两个知识点，并做强化训练。
四、布置家庭作业
1.熟读Let’s learn more
2. 完成配套练习第17页第Ⅴ。
课后反思：