YOU SAID:

This time I'm really gonna do it

INTO JAPANESE

今度は本当にやる

BACK INTO ENGLISH

This time I'm really gonna do it.

INTO JAPANESE

今度は本当にやるよ

BACK INTO ENGLISH

I'll really do it this time.

INTO JAPANESE

今回は本当にやります。

BACK INTO ENGLISH

I'll really do it this time.