Поставьте эти предложения в вопросы и в отрицания.
They are brothers
We are friends.
I am a student.
You are a teacher.
He is a doctor.
She is a movie star.

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?