I'm not a pilot.
(わたしはパイロットではありません。)
You aren't a pianist.
(あなたはピアニストではありません。)
You aren't singers.
(あなたたちは歌手ではありません。)
He isn't a driver.
(彼は運転手ではありません。)
She isn't a doctor.
(彼女は医者ではありません。)
They aren't nurses.
(彼らは/彼女たちは、看護師ではありません。)
I'm not = I am not You aren't = You are not He isn't = He is not She isn't = She is not
They aren't = They are not