YOU SAID:

I have been cheating on plays, even though he doesn't know.

INTO JAPANESE

たとえ彼が知らないとしても、私は演劇をだましてきた。

BACK INTO ENGLISH

Even though he doesn't know, I've tricked the play.

INTO JAPANESE

彼が知らないにもかかわらず、私はその遊びをだました。

BACK INTO ENGLISH

Even though he did not know, I deceived the play.

INTO JAPANESE

彼が知らなかったにもかかわらず、私はその演劇をだました。

BACK INTO ENGLISH

Even though he did not know, I deceived the play.