1. I’m writing

2 I was writing

3. Is sleeping

4.was sleeping

5. Aren’t doing, are playing

6. Weren’t doing, were playing

7. Are you eating?

8. Were you eating?

9. Is doing

10. Was doing

11. Is she crying

12. Was she crying

13. Was reading

14. Isn’t reading

15. Is going

16. Are you doing, I’m drinking

17. Were you drinking, I wasn’t drinking, I was eating

18. Was reading, is reading

19. Is playing

20. Was shining, were singing