1.l'm reading/ l'm not reading/ are you reading
2. are swimming, arn't swimming / are you( they) swimming
3.is playing/ isn't playing / is Jack
playing
4.are making/ arn't making/ are Nick and Jain(they) making
5.is lining/ isn't lining/ is Helen lining
6. is slipping
7. is crying
8.are doing
9.is having
10. is swimming