YOU SAID:

I'm gonna to make him an offer he can't refuse

INTO JAPANESE

私は彼に断れない申し出をするつもりです

BACK INTO ENGLISH

I'm going to make an offer that I can't refuse to him

INTO JAPANESE

私は彼に断れない申し出をするつもりです

BACK INTO ENGLISH

I'm going to make an offer that I can't refuse to him