13)
1. is
2. is not
3. is working
4. works
5. is
6. is doing
7. does
8. are
9. are playing
10. play
11. do you know
12. am
14)
1. don’t you finish
2. don’t understand
3. didn’t you ask
4. don’t like
5. don’t you like
6. always shouts
7. does he shout
8. don’t work
9. don’t do
10. shouts
