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教学重难点：
1、能够熟练运用以下句型结构：We use … to ….
We should / should not ….
2、单词“environment”的朗读
教学准备：多媒体
教学步骤：
Step1：Warm up
Introduction
Free talk
What’s your name？
How are you?
What do you like doing ?
Watch the video
T: Is the Bird happy?
S: No.
T: Why？
Ss：Because…
T:Let’s protect our earth. To protect the earth, what should we do?
Ss: We should protect the earth.
【设计意图：通过日常对话，引入对Story time的复习。】
Step2：Revision
Review the storytime of Unit7
T: Why should we save water?
S: Water is useful./We use too much water./…
T: What do we use water to do? (用PPT展示关于水的图片)
S: …
T: Water is useful. We use water to clean things. Then how can we save water? What should we do? (用PPT呈现图片)
S: We should reuse water.
T: What should we not do?
S: We should not waste water.