Are they running?
No, they aren't.
Are they playing football?
No, they aren't.
......? Yes, they are.
Are they running?
Are they swimming?
Yes, they are.
.....? Yes, they are.
Are they jumping?
Are they having fun?
Yes, they are.
.....? No, they aren't.
Are they watching TV?...
.....? No, they aren't.
Are they swimming?....
Are they sitting on a chair?
No, they aren't.
Are the penguins walking?
Yes, they are.