Are you a teacher? - Yes, I am & No, I'm not
IS IT a bird? - Yes, it is & No, it isn't
Is Pam a student? - Yes, she is & No, she isn't
Are they records? - Yes, they are & No, they aren't
Is Paul at home? - Yes, he is & No, he isn't
Are you doctors? - Yes, we are & No, we aren't