1. didn't see, was walking
2. was doing, came
3. saw, wasn't working, was sleeping
4. came, were playing
5. didn't hear, were playing
6. was barking, came
7. was watching, arrived
8. was studying, began
9. wasn't hunting, shot
10. were playing, started
11. gave, was leaving
12. saw, were visiting
13. were driving, was born
14. was singing, lost
15. stopped, wasn't wearing
16. were you doing, happened
17. were walking, saw

1.didn't see, was walking

2.was doing, came

3.saw, wasn't working, was sleeping

4.came, were playing

5.didn't hear, were playing

6.was barking, came

7.was watching, arrived

8.was studying, began

9.wasn't hunting, shot

10.were playing, started

11.gave, was leaving

12.saw, were visiting

13.were driving, was born

14.was singing, lost

15.stopped, wasn't wearing

16.were you doing, happened

17.were walking, saw