Is he reading a book?
Yes, he is
Is she dancing?
Is she drawing?
Yes she is
Is he painting?
Yes, he is
Is he drawing?
No, he isn't
Is he playing football?
Yes, he is
Is he listening to music?
Yes, he is
Is he playing computer games?
Yes, he is
Is he watching TV?
Yes, He is
Is he playing computer games?
No, he isn't
is he playing football?
No, he isn't