a) She is not a secretary.
She isn't a secretary.
b) He is not a singer.
He isn't a singer.
c) You are not a good friend.
You aren't a good friend.
d) It is not an orange.
It isn't an orange.
e) They are not teachers.
They aren't teachers.
f) Jane is not well today.
Jane isn't well today.
Prontinho, espero ter ajudado :)
