2)He isn't writting
3)We aren't working
4)Are you reading?
5)Is he sleeping?
6)Nick and Andrew playing football
7)Kate is playing the piano
8)She isn't singing
9)My sister is sleeping now
10) Is father drinking tea?
11) Are your parents drinking tea now?
12) I am do not sleeping
13) She isn't sitting at the table
14) We are doing exercise
15) We aren't swimming
16) They are playing in the yard
17) Nina and Ann are cleaning the floor