(+) S + be + Ving + O.

Eg. She is doing her homework at the present.

(-) S + not be + Ving + o.

Eg. They aren't watching TV now.

(?) Be + S + Ving + O ?

Eg. Are you learning English?

1. was

2. has lived

3. Have you just washed

4. haven't seen/was

5. has visited/came

6. have worked

8. haven't seen

7. has lived

9. has had

10. have been

11. Has she fed/fed

12. have just made

13. hasn't seen/was

14. have worked.

15. Have you met/ said

16. haven't got

17. have ever drived

18. cancel/was

19. hasn't had