YOU SAID:

under no circumstances should you slap you teacher

INTO JAPANESE

あなたは先生を平手打ちすべきなのではない

BACK INTO ENGLISH

You shouldn't slap your teacher.

INTO JAPANESE

先生を平手打ちしてはいけません。

BACK INTO ENGLISH

Don't slap the teacher.

INTO JAPANESE

先生を平手打ちしないでください。

BACK INTO ENGLISH

Don't slap the teacher.