Https://video.ibm.com/channel/B7jnE4SzHy8
https://video.ibm.com/recorded/125821196
https://video.ibm.com/playlist/623157
https://video.ibm.com/playlist/623157/video/125821196

1. Father (was watching) TV at ten o'clock yesterday.
2. I (went) to bed at nine o'clock yesterday.
3. I (finished) my homework at nine o'clock yesterday.
4. I (was playing) the piano at five o'clock yesterday.
5. He (began) to do his homework at four o'clock yesterday.
6. She (was washing) the floor at four o'clock yesterday.
7. I (met) Nick at three o'clock yesterday.
8. When I (came) home, Kate (was playing) the piano.
9. When I (met) John, he (was going) to the railway station.
10. When I (was going) to the museum, I (saw) a big crowd of people in the street.
11. They (played) in the yard in the evening yesterday.
12. They (were playing) in the yard the whole evening yesterday.
13. I (cleaned/was cleaning) my teeth at eight o'clock in the morning yesterday.
14. We (went) to the wood in summer.
15. When the teacher (opened) the door of the classroom, the pupils (were sitting) at their desks.

4) My father doesn't always buy magazines in this news-stall

Does my father always buy magazines in this news-stall.

5) He doesn't rarely help his mother.

Does he rarely help his mother?

6) They don't often work in the garden.

Do they often work in the garden?

7) I don't seldom write letters.

Do i seldom write letters?

8) My brother often gets good marks.

Does my brother often get good marks?

9) These books usually cost much.

Do these books usually cost much?

10) They always bring textbooks

Do they always bring textbooks?

Последние 3 в задании отрицательные и так, сделала положительные вместо отрицательных.