Are you a student?
Yes. I am. // Yes, I am a student.
No, I'm not. // No, I am not a student.
Are they students?
Yes. They are. // Yes, They are students.
No, They aren't. // No, They aren't students.
Are you a student?
Yes. I am. // Yes, I am a student.
No, I'm not. // No, I am not a student.
Are they students?
Yes. They are. // Yes, They are students.
No, They aren't. // No, They aren't students.