YOU SAID:

I don't ever even ever never ever ever do this

INTO JAPANESE

私はこれまでこれまでやることはありませんでした

BACK INTO ENGLISH

I have never done so far

INTO JAPANESE

今までやったことがない

BACK INTO ENGLISH

I have never done it before

INTO JAPANESE

今までやったことがない

BACK INTO ENGLISH

I have never done it before