What `s he doing?
He`s swimming?
What`s she doing?
She`s cooking.
What`s he doing?
He`s playing football.
What `s the dog doing?
It`s (The dog) sleeping?
What `s the cat doing?
It`s (The cat) watching TV?
What are they doing?
They`re dancing.
What `s she doing?
She`s playing basketball?
What `s Ann doing?
Ann`s (She`s) singing.