1) is, are, is, are, are, is, are, am, is, are
2) I am not a teacher. She is my brother. The boys are playful. The girl is inthe room. We are not at home. My dad is smart. My mother is a housewife. She is not my sister. The teacher is angry. The dog is in the kennel.
3)yes, it is
yes, it is
yes, they are
no, he is not
yes, he is
no, he is not
yes, she is
no,he is not
no, they are not
no, I am not
no, it is not