He IS / ISN'T a teacher.
IS
He IS / ISN'T a farmer.
IS
She IS / ISN'T a vet.
ISN'T
He IS/ISN'T an artist.
ISN'T
ARTIST
She is an artist.
FARMER
He isn't a farmer.
COOK
he is a cook
ARTIST
He is an artist
DOCTOR
He is a doctor
TEACHER
She isn't a teacher.
TEACHER
She is a teacher.
VET
She isn't a vet
He IS/ISN'T a doctor.
ISN'T
He IS/ISN'T a farmer.
ISN'T
She IS / ISN'T an artist.
IS
She IS / ISN'T a vet.
ISN'T
