1-What are you doing, are you writing, I have written your, I am working, when did you write, I finished it.
2-I have already had dinner.
3-What's the weather like? Is it still raining? — No, it has stopped raining.
4-I have lost mine.
5-I have not met Peter.
6-Nina has just finished work.
7-Where is Sergei, he has gone, he left. 8-What are you reading, I am
reading.
9-They read, have you read.
10-My watch has stopped, there is.
11-Have you seen Jack, I saw him.
12-Have you heard, I have, when did you hear it?, I heard it.
13-You have changed, has
anything happened?