Tell me what activity it is.
Play the guitar
Are they doing homework?
No, they aren't. They are sleeping.
Is he playing the guitar?
No, he isn't. He is listening to music.
Tell me what activity it is.
Do homework
What are they doing?
They are playing.
Are they playing?
No, they aren't. They are watching TV.
What is he doing?
He is eating.
What is she doing?
She is drinking.
What are they doing?
They are sleeping.
Tell me what activity it is.
Listen to music
Tell me what activity it is.
Watch TV
What are they doing?
They're eating.