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