Помогите пожалуйста срочно даю 50 балов!

Ответ:

1. He was an interesting man.
2. When he came back workers had already cleaned the pavement.
3. What were you doing yesterday evening?
4. He said Mum had already gone out.
5. I ran into Tom yesterday.
6. When I entered the class room the lesson was going on.
7. Could you ski when you were little?
8. I skied when I was at the university.
9. Have you heard from him lately?
10. Did you see the moon last night?

Объяснение: