Răspuns:
1. they eat
2. they ate
3. were they eating
4. they are not laughing
5. they don't laugh
6. they were not laughing
7. is she dancing?
8. did she dance?
9. were she dancing?
10. are they playing?
11. do they play?
12. did they play?
13. while
14. when
15. when
