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2.What date is/was it today/yesterday?
3.What’s/was the weather like today/yesterday?
Step 2 Warm up
1. T: Let’s have a guess.
It is blue, green and white. It is very big. It looks like a ball. What is it?
S: Earth
2 .T: We have only one earth, so we call it “the Earth”（世界上独一无二的东西用the）
T teach : early---earth, the earth.
3.T: What’s wrong with our earth? Let’s watch a video.
S: Our earth is sad.
1.T: I think we should protect the earth.
T teach pro---tect---protect
T show the title , today we are going to learn ‘Unit7 Protect the Earth’.
Step3 Presentation and practice
1.Save water
(1)T: Look! This is our big home--- the Earth. Look at the blue part. What is it?
Ss: Water.
T: Most of the Earth is covered by water. We use water to do many things.
So I think water is useful. (Teach: useful)
(2)S: We use water to...(操练 use…to…)
(3)T: We can use water to do many things. But in many places, there’s not much water.
What should we do?
S1: We should save water. (Teach: save, save water)
(4) T: How to save water?
S: We should not waste water.
(Teach: should not= shouldn’t, waste)
(5) T: Look at this sign. What does it mean?
Ss: Reuse.
T: We should reuse water. (Teach: reuse)
(6)T: How to reuse water?