YOU SAID:
how did you know I was korean?
INTO JAPANESE
私が韓国人であることをどうやって知ったのですか?
BACK INTO ENGLISH
How did you know that I was Korean?
INTO JAPANESE
私が韓国人であることをどのように知っていましたか?
BACK INTO ENGLISH
How did you know that I was Korean?
Well done, yes, well done!