Unit 4 An old man tried to move the mountains.
3a--self-check
一 .自主预习：Finish the exercises.
二．合作探究：1.Why are you wearing a coat?
Wear表状态后接衣物.帽.手套.眼镜.手表等。
She was wearing sun-glasses.
Mike is wearing a new coat.
Put on穿着,指状态,不用与进行时连用。
Has often has on a black coat.
Be in 表穿的状态，后接表颜色或衣服的词。
Is he in blue dress?
The woman is in red.
