Are you playing with the dog?
No, I'm not. I'm not playing with the dog.
Is he drawing a picture?
No, he isn't.
Is he watching TV?
Yes, he is. He's watching TV.
Is he playing on the beach?
No, he isn't.
Is she cleaning her house?
No, she isn't. She's dancing.
Is she walking?
No, she isn't. She isn't walking.
Is he reading a book?
Yes, he is.
Is she doing her homework?
No, she isn't.
Is she riding a bike?
Yes, she is.
Is he eating a cake?
No, he isn't. He isn't eating a cake.