YOU SAID:
i don't know? don't worry!
INTO JAPANESE
知りません?心配しないで!
BACK INTO ENGLISH
I do not know? do not worry!
INTO JAPANESE
私は知らない?心配しないでください!
BACK INTO ENGLISH
I do not know? please do not worry!
INTO JAPANESE
私は知らない?心配しないでください!
BACK INTO ENGLISH
I do not know? please do not worry!
You've done this before, haven't you.