Is he using the computer?
Yes, he is.
Are they eating?
Yes, they are.
Is it playing soccer?
Yes, it is.
Are they sleeping?
No, They aren’t. They are dancing.
Is he studying?
No, he isn’t. He’s cooking.
What's he doing?
He's reading a book.
What's she doing?
She's taking pictures.
Is he painting?
Yes, he is.