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模块二 Module II Making discoveries《Grammar and usage(1)： Present perfect tense》公开课教案优质课下载
Step 1: Lead-in
Look at the following sentences and try to explain why the tense is used in these sentences.
1. We have studied English for about five years.
2. They have lived there since 1990.
3. She hasn’t finished her homework yet.
4. Eric has just come back.
5. How long have you been here?
Step 2:预习检测
一、现在完成时
1. 现在完成时的构成：（以do为例）
主动形式___________________________
被动形式___________________________
2. 现在完成时的用法：
(1）He has turned off the light.
(2）Justin has disappeared, so Kelly is very sad.
The disappearance of Justin has made Kelly very unhappy.
（3）He has lived here since 1995.
（4）Some villagers say that they have seen UFOs many times.
现在完成时的一般用法？
(1）
(2）
（3）
3. Practice:
1). I _____already _______ (see) the film.
2). Grain output ________________(increase) in the past few years.