What is he doing?
He is swimming.
What is she doing?
She is cooking.
What are they doing?
They are watching TV/laughing.
What is he doing?
He is eating a sandwich.
What is he doing?
He is writing.
What is he doing?
He is skating/falling in the water.
What is he doing?
He is playing the guitar.
What is he doing?
He is riding a bike.
What are they doing?
They are dancing.
What is he doing?
He is drinking water.
What are they doing?
They are playing soccer.
What is she doing?
She is reading a book/drinking.
What are they doing?
They are skipping.
What is she doing?
She is singing.
What are they doing?
They are talking/kissing.
What are they doing?
They are climbing a tree.