YOU SAID:

In this classroom, I'm the master

INTO JAPANESE

この教室では私がマスターです

BACK INTO ENGLISH

I am the master in this classroom.

INTO JAPANESE

私はこの教室のマスターです。

BACK INTO ENGLISH

I am the master of this classroom.

INTO JAPANESE

私はこの教室のマスターです。

BACK INTO ENGLISH

I am the master of this classroom.