【Be動詞否定句】
只要在句子裡找到Be動詞，在他的後面加上not就變成否定句
I am not a teacher.
You are not a police officer.
You aren’t a police officer.
He is not a postman.
He isn’t a postman.
She is not a clerk.
It is not a dog.
We are not friends.
You are not classmates.
They are not sisters.
Ana is not a crazy girl.
Ana and Tina are not good friends.
同場加映：Be動詞
