YOU SAID:

How the heck was I supposed to know that

INTO JAPANESE

どのようにして私はそれを知っているはずだった

BACK INTO ENGLISH

How I should have known it

INTO JAPANESE

どのように私はそれを知っていたか

BACK INTO ENGLISH

How did I know it?

INTO JAPANESE

方法でそれを知っていましたか。

BACK INTO ENGLISH

By the way did you know that?

INTO JAPANESE

それより 瀬川君 知ってた？

BACK INTO ENGLISH

By the way, did you know?

INTO JAPANESE

それより 瀬川君 知ってた？

BACK INTO ENGLISH

By the way, did you know?