1 she is not doing her homework now.
2 what is she doing now?
3 is she doing her homework now?
4 Yes,she is.No,she isn't.
1 They are not playing football on the playground.
2 What are they playing on the playground?
3 Where are they playing football?
4 Are they playing football on the playground?
5 Yes,they are.No,they aren't.