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
You've done this before, haven't you.