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1. While Jane was reading a book, Susan was watching TV.
2. The boys were playing football when their mother came.
3. I was writing three letters the day before yesterday.
4. When the ship hit the iceberg, the passengers were sleeping.
5. While Nick was skiing in the mountains, Teddy was swimming in the ocean.
6. When we went out, it was snowing heavily.
7. When I was leaving the room, I dropped my keys.
8. What was your friend doing when you met him?
9. When Andrew came home, his mother was cooking dinner.
10. Ann was drawing a picture while Fred was writing a letter.
11. What were you writing when the teacher came?
12. Teddy was speaking over the phone when the door bell rang.
13. He was solding his car at 4 o'clock yesterday.
14. The boys were fighting when their father came in.
15. He was getting on the train when the train moved.
16. When I came home, I met my old friend.
17. My sister was cooking while I was washing the windows.
18. When the war began, they were moving to Europe.
19. Was he listening while the teacher was speaking?
20. When the storm began, I was watering the flowers.
21. Mark was studying in his room, when he heard a terrible noise.
22. Jenny was waiting for me when I arrived.
23. What were you doing at this time yesterday?
24. Were you driving fast when the accident happened?
25. Sam was taking a photograph of me while I wasn't looking.