YOU SAID:
then you line is "how did you know that?"
INTO JAPANESE
それから、あなたはどのようにそれを知っていましたか?
BACK INTO ENGLISH
And how did you know it?
INTO JAPANESE
あなたはどうやってそれを知ったのですか?
BACK INTO ENGLISH
How did you get to know it?
INTO JAPANESE
どうやってそれを知ることができましたか?
BACK INTO ENGLISH
How did you find out about it?
INTO JAPANESE
あなたはどうやってそれについて知りましたか?
BACK INTO ENGLISH
How did you hear about it?
INTO JAPANESE
それについてどうやって聞いたのですか?
BACK INTO ENGLISH
How did you hear about that?
INTO JAPANESE
それについてどうやって聞いたのですか?
BACK INTO ENGLISH
How did you hear about that?
You've done this before, haven't you.