1 am writing
2 was writing
3 is sleeping
4 was sleeping
5 aren't doing, are playing
6 weren't doing, were playing
7 Are you eating
8 Were you eating
9 What is your father doing
10 What was your father doing
11 Why is she crying
12 Why was she crying
13 was reading
14 is not reading
15 is going
16 are you doing, am drinking
17 Were you drinking, was not drinking, was eating
18 was reading, is reading
19 is playing
20 was shining, were singing