Put the verbs in brackets in the Past Tense or Past Perfect:

1. I told him that I never, to do) such a thing until then.
2. When he was young, he (to like) to collect stamps.
3. After I (to mix) my colours, I started painting.
4. She told me that she (never, to see) an oyster.
5. The pupils (to understand) it after the teacher (to explain) it to
6. I saw him the moment he (to enter).
7. What (he, to say) when he saw you?
8. I (never, to see him in my life, so of course I couldn't recognize him.
9. After I (to arrive) at the station yesterday, I (to see) some of my the platform friends on.
10. Last night after we (to have) our dinner, we (to go out) for a walk.
11.I (to see) a big ship last week; I (never, to see) one before.
12. After the game (to end), the public left the stadium.
13. The fire (to be put out) before the fireman arrived there.
14. After I (to finish) my home task, I went to the cinema with two of my friends.
15. He (to wait) outside for half an hour before the teacher told him to go home.