1. I am a student.
Am I a student?
Yes, I am.
No, I am not.
I am not a student.
2. He is my teacher.
Is he my teacher?
Yes, he is.
No, he isn't.
He is not my teacher.
3. She is the best student in our class.
Is she the best student in our class?
Yes, she is.
No, she isn't.
She is not the best student in our class.
4. It is my favourite book.
Is it my favourite book?
Yes, it is.
No, it isn't.
It is not my favourite book.
5. We are friends.
Are we friends?
Yes, we are.
No, we aren't.
We aren't friends.
6. They are the founders of this company.
Are they the founders of this company?
Yes, they are.
No, they aren't.
They are not the founders of this company.