Is he feeding the pets?
No, he isn't.
Is he swimming?
No, he isn't.
What's he doing?
He's sailing a boat.
Is he sailing a boat?
Yes, he is.
What is he doing?
She's flying a kite.
Is he swimming?
Yes, he is.
Is she flying a kite?
Yes, she is.
Is he eating ice cream?
Yes, he is.
What are they doing?
They're building a sandcastle.
Is she building a sandcastle?
Yes, she is.
Is he sleeping?
Yes, he is.
Is she sleeping?
No, she isn't.
What's she doing?
She's eating ice cream.
Is he sailing a boat?
No, he isn't.