Is he painting?
No, he isn't.
Is she laying the table?
No, she isn't.
Is she sweeping?
Yes, she is.
Is he washing up?
Yes, he is.
Is she watering the flowers?
Yes, she is.
Is he cooking?
Yes, he is.
Is he drying up?
No, he isn't.
Is she cooking?
Yes, she is.