YOU SAID:
You've never not done this, have you not.
INTO JAPANESE
あなたはこれをやったことがありませんね。
BACK INTO ENGLISH
You've never done this, have you?
INTO JAPANESE
あなたはこれをしたことがありませんよね?
BACK INTO ENGLISH
You've never done this, have you?
Come on, you can do better than that.