YOU SAID:

I don't really like this teacher.

INTO JAPANESE

この先生本当に好きではないです。

BACK INTO ENGLISH

Really like this teacher is not.

INTO JAPANESE

本当にこの先生はないです。

BACK INTO ENGLISH

This teacher is not really.

INTO JAPANESE

この先生は本当にありません。

BACK INTO ENGLISH

This teacher is not really.