1. think - is knocking
2. don't know - hasn't spoken
3. circles
4. are you staring - haven't seen
5. have you seen
6. play
7. is increasing
8. haven't been waiting
9. goes - is travelling
10. are - have been
11. haven't watered
12. has lost
13. haven't finished - have been dealing
14. does your father do - is - isn't working
15. Have you ever seen - have seen