11. is..having
12. are they going
13. am sleeping
14. are building
15. are studying
16. is watching

1.am
2.is nam
3.are you
4. am doing
5.are studying
6.are listening
7.is watching
8.is study
9.is building
10.is plantting
11.is waiting
12.is cooking 
13.are swimming
14.is using
15.Are you doing
16.are they driving
17.is he repair 
18.is repainting
19.is your classmates doing
20.is she travel
21.is he have
22.are they going
23. sleeping
24.is building
25.is studying
26.are having
27.is watching
28.is watching
29. is plantting
30. is doing