Сначала утверждение, затем отрицание, потом вопрос:
They are brothers.
They are not brothers.
Are they brothers?
We are friends.
We are not friends.
Are we friends?
I am a student.
I am not a student.
Am I a student?
You are a teacher.
You are not a teacher.
Are you a teacher?
He is a doctor.
He is not a doctor.
Is he a doctor?
She is a movie star.
She is not a movie star.
Is she a movie star?