Is she your friend?
Yes, she is.
Who is she?
She's my mother
Is she your mother?
No, she isn't.
Are they your parents?
No, they aren't.
Who is he?
He's my father.
Who are they?
They're my parents.
Who is he?
He's my brother
Who is she?
She's my sister
Is he your father?
Yes, he is.
Is he your brother?
Yes,he is.
Who are they?
They are children.
Are they children?
Yes, they are.