YOU SAID:

dont start what you can not finish

INTO JAPANESE

あなたが終わることができないものを開始しないでください

BACK INTO ENGLISH

Don't start what you can't finish

INTO JAPANESE

終わらせられないものを始めないでください

BACK INTO ENGLISH

Don't start anything you can't finish

INTO JAPANESE

終わらせることができないものは何も始めないでください

BACK INTO ENGLISH

Don't start anything you can't finish