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.

Вот преобразование каждого предложения — в вопросительную и в отрицательную формы (даю полную и сокращённую отрицательные формы):

1. They are brothers.
   • Вопрос: Are they brothers?
   • Отрицание: They are not brothers. / They aren’t brothers.

2. We are friends.
   • Вопрос: Are we friends?
   • Отрицание: We are not friends. / We aren’t friends.

3. I am a student.
   • Вопрос: Am I a student?
   • Отрицание: I am not a student. / I’m not a student.

4. You are a teacher.
   • Вопрос: Are you a teacher?
   • Отрицание: You are not a teacher. / You aren’t a teacher.

5. He is a doctor.
   • Вопрос: Is he a doctor?
   • Отрицание: He is not a doctor. / He isn’t a doctor.

6. She is a movie star.
   • Вопрос: Is she a movie star?
   • Отрицание: She is not a movie star. / She isn’t a movie star.