II.
1. going
2. are you doing - am watching
3. are
4. is being built
5. Will you be
6. returns
7. listening
8. to learn
9. am having
III.
1. portable
2. excited
3. painting
4. mainly
5. unhealthy
6. careless
7. unhappy
8. employees
9. better
10. furnished
IV.
1. at → ∅
2. to play → playing
3. Do you know how much does a banana cost?
4. will → would
5. are playing → play
6. catch → catching
7. scientific → computer science
8. much → ∅
9. less → fewer
10. many → ∅