1. Had you been waiting
2. had been trying
3. had been raining
4. had been thinking
5. Had you been studying
6. Had been looking
7. Had been waiting
8. had been planning
9. Had you been researching
10. had been living
11. had been working
12. had Tom and Julie been dating
13. had been writing
14. had you been waiting
15. had been walking
16. had been enjoying
17. had been looking
18. had the car been working
19. had been feeling
20. had not been travelling
21. had been working
22. had been waiting
23. had been barking
24. had been talking
25. had been playing
26. had not been smoking
27. had not been drinking
28. had been running
29. had been going
30. had been snowing
31. had been making
32. had been sitting