YOU SAID:

You've done this before, haven't you? Of course not. U nub

INTO JAPANESE

あなたは前にこれをやったことがありますか？もちろん違います。うな

BACK INTO ENGLISH

Have you done this before? of course not. Una

INTO JAPANESE

これをやったことがありますか？もちろん違います。うな

BACK INTO ENGLISH

Have you done this? of course not. Una

INTO JAPANESE

あなたはこれをしましたか？もちろん違います。うな

BACK INTO ENGLISH

Did you do this? of course not. Una

INTO JAPANESE

これやった？もちろん違います。うな

BACK INTO ENGLISH

Did you do this? of course not. Una