VERB TO BE SIMPLE PRESENT

I	am	a student.
He	is	a teacher.
She	is	a journalist.
It	is	a book.
We	are	mechanics.
You	are	pilots.
They	are	policemen.

I	am not	a singer.
He	is not	a receptionist.
She	is not	a nurse.
It	is not	my book.
We	are not	not musicians.
You	are not	a shop assistant.
They	are not	taxi drivers.

http://www.eclecticenglish.com/grammar/PresentSimpleToBe1A.html

Contracted negative forms of the verb to be

I'm not		a singer.
He	isn't	a receptionist.
She	isn't	a nurse.
It	isn't	my book.
We	aren't	not musicians.
You	aren't	a shop assistant.
They	aren't	taxi drivers.

http://www.eclecticenglish.com/grammar/PresentSimpleToBe1A.html

Am	I	right?
Is	he	here?
Is	she	a nurse?
Is	it	second-hand?
Are	we	wrong?
Are	you	Alan Parker?
Are	they	American?