1. When I (came) home, mother had already (cooked) dinner.
2. When father (returned) from work, we had already (done) our homework.
3. When the teacher (entered) the classroom, the pupils had already (opened) their books.
4. Kate (gave) me the book which she ( had bought) the day before.
5. Nick (showed) the teacher the picture which he ( had drawn).
6. The boy (gave) the goats the grass which he ( had brought) from the field.
7. Mother (saw) that Nick ( had not washed) his hands.
8. The teacher (understood) that Lena ( had not done) her homework.
9. I (knew) that my friend ( had not yet come).
10. Tom (returned) from the cinema at five o'clock.
11. Tom ( had returned) from the cinema by five o'clock.
12. I ( finished) my homework at seven o'clock.
13. I ( had finished) my homework by seven o'clock.
14. He (thought) that he ( had lost) the money.
15. Ann (told) me that she ( had seen) an interesting film.
16. When I (woke) up yesterday, father had already (gone) to work.
17. Nick (thought) that his father ( had not yet come) home.
18. Mary (told) us that she ( had cooked) a good dinner.
19. Yesterday I (found) the book which I ( had lost) in summer.
20. When we (came) to the station, the train had already (left).