1)is coming

2)is teaching

3)is studing

4)are singing

5)are not surfing

6)is wearing

7)are sitting

8)is going

9)is traveling

10)are playing

11)is flying

12)is mending

13)is doing

14)is snowing

15)is bakeing

16)is joying

17)is preparing

18)are breaking

19)are behaving

20)is planting