YOU SAID:
I don't know any magic.
INTO JAPANESE
私は任意の魔法を知らない。
BACK INTO ENGLISH
I do not know of any magic.
INTO JAPANESE
分かりません。
BACK INTO ENGLISH
I don't understand.
INTO JAPANESE
分かりません。
BACK INTO ENGLISH
I don't understand.
You've done this before, haven't you.