Is he playing computer games?
No, he isn't
Are they playing basketball?
No, they aren't
Is he eating?
Yes, he is
Are they playing volleyball?
Yes, they are
Are they playing the piano?
Yes, they are
Is she dancing?
Yes, she is
Are they going shopping?
Yes, they are
Is he eating?
Yes, he is
Is he swimming?
No, he isn't
Are they cooking?
Yes, they are
Is he playing games?
Yes, he is
Is he playing the guitar?
Yes, he is
Are they playing football?
No, they aren't
Is he playing the guitar?
No, he isn't