What's he doing?
He's watching TV.
What are they doing?
They're climbing a tree.
What's he doing?
He's going to school.
What's he doing?
He's going swimming/swimming.
What are they doing?
They are playing football.
What are they doing?
They are studying.
What are they doing?
They're dancing.
What's she doing?
She's listening to music.
What is she doing?
She's painting.
What are they doing?
They're playing chess.
What's she doing?
She's singing.
What's he doing?
He's playing the guitar.
What's she doing?
She's going fishing.