What is he doing?
He's/ He is sleeping.
What are you doing?
I'm/ I am singing.
What are you doing?
We're/ We are reading.
What are they doing?
They're/ They are playing.
What is he doing?
He's/ He is drawing.
What are they doing?
They're/ They are dancing.
What is he doing?
He's/ He is writing.
What is she doing?
She's/ She is drinking.
What are they doing?
They're/ They are drinking.
What are they doing?
They are/ They're talking.