Поставь каждое предложение в отрицательную форму.1)I am a good pupil2)You are a teacher 3)We are good friends.4)They are happy 5)He is sad.

1) I am not a good pupil
2) you aren`t (are not) a teacher
3) we aren`t (are not) good friends
4) they aren`t (are not)
5) he isn`t (is not) sad

I'm not a good pupil.
You aren't a teacher.
We aren't good friends.
They aren't happy.
He isn't sad.