1. Did you see martin yesterday?
2. When I reached the station, the bus has already left.
3. cred ca e corecta.
4. John has been here since last Wednesday.
5. Have you ever went to China?
6. At three o'clock last night, the children were sleeping.
7. [...] when the phone rang.
8. [...] He went to Geneva.
9. I haven't understood what the teacher said today.
10. [...] you have just broken my computer!
11. When did you stop drinking coffee?
12. [...] Yes, I was.
13. Has the rain stopped yet?
14. They have known each other [...]
15. When I got home, Dan was playing the piano and Sam was watching TV.
16. When I left the room it was dark.
17. When you come [...]
18. This is the man who was following me last night.
19. Where are you going now?
20. What were you thinking about when I entered the room last night?