Is he playing a board game?
Yes, he is.
Is she surfing the Web?
No, she is not.
Are you playing a video game?
No, I am not.
Is he watching TV?
Yes, he is.
Is he studying for an exam?
No, he isn't.
Is it listening to music?
Yes, it is.
Are you surfing the Web?
Yes, I am.
Are you playing a board game?
No, I am not.