1. She sings every day.

2. I had been swimming.

3. We used to love going out for dinner.

4. They had been working hard.

5. He has not stopped laughing.

6. She had been sleeping for hours.

7. I am taking it easy.

8. We were running around.

9. He will have gone by now.

10. She could have stayed.

11. I shall have finished by five o'clock.

12. We must have been really tired.

13. He may have been joking.

14. She would have been alone.

15. I might have seen them.

16. We could have talked for hours.

17. He should have remembered.

18. She would have remembered.

19. I would have asked.

20. We could have gone.

21. He might have looked.

22. She must have left early.

23. I ought to have paid the bill.

24. We would have waited for you.

25. He could have arrived sooner.

26. She had been doing her homework.

27. I must have been away.

28. We ought to have stayed at home.

29. He should have been more careful.

30. She would have said something.