1. The sun has not risen yet..
2. I saw you...
3. I have not read ....
4. trams have stopped running
5. How many times have you been...
6. I have translated this article....
7 ..but the rain spoilt all the pleasure.
8. ...but now it has stopped.
9. The lecture has not begun yet ...
10.She has just gone out.
11. She left the room ...
12. We have not solved...
13. When did it all happen?
14 ....the weather has changed...
15. ....which you have made.
16.A large black cloud has covered the sky.
17. ....all my papers have fallen on the floor...
18. When did you open the window? — I opened it ten minutes ago