Is she watching TV?
No, she isn't
Is he watching TV?
No, he isn't
Are they watching TV?
Yes, they are.
Is she listening to music?
No, she isn't
Are they palying the guitar?
No, they aren't.
Is she doing homework?
Yes, she is
Is he doing homework?
No, he isn't
Is she listening to music?
No, she isn't
Is he watching TV?
No, he isn't
Is he listening to music?
Yes, he is
Is he playing the guitar?
Yes, he is
Is she playing guitar?
Yes, she is
Is she doing homework?
No,she isn't