模块二Unit3：Grammar教案（共两课时）

Unit3 Grammar and usage Period One Present perfect tense

Teaching aim:

To give a brief introduction to the present perfect tense

Teaching procedures:

1 Go over the news story on Page 2 and find the sentences using the present perfect tense.

Please explain why the tense is used in these sentences.

2 The form of the present perfect tense

3 Talk about the uses of the present perfect tense

A We use the present perfect tense to talk about things that happened in the recent past, but are connected to the present.

The disappearance of Justin has made Kelly very unhappy.

B We also use the present perfect tense to talk about something that started in the past, and is still happening now.

I have not seen Justin since last Friday night.

C We use the present perfect tense when the exact time of an action is not clear or important. We use it with time expressions such as:

already ever for just lately never recently since yet

We use already for affirmative statements and yet for negative statements.

We use for + a period of time and since + a point in time.

D We use the present perfect tense to talk about actions that were completed only a short time ago. In this case, just is used. Pay attention to the position of just.

He has just gone out.(=He went out a few minutes ago.)

We use the present perfect tense here to tell others that he isn't here now.

I have just heard the news.(Now I know the news.)

E We can also use the present perfect tense for repeated actions, that is, we use the present perfect