YOU SAID:
I'm not sure about it
INTO JAPANESE
私はそれについてはよく分かりません
BACK INTO ENGLISH
i'm not sure about that
INTO JAPANESE
そのことはよくわからない
BACK INTO ENGLISH
I'm not sure about that
INTO JAPANESE
そのことはよくわからない
BACK INTO ENGLISH
I'm not sure about that
You've done this before, haven't you.