YOU SAID:

If me did nothing I did do something and you know

INTO JAPANESE

何か、あなたが知っている私は何かをしなかった場合

BACK INTO ENGLISH

If I know something that you did what?

INTO JAPANESE

私は何かを知っている場合は、何をしたか。

BACK INTO ENGLISH

If you know what I did what?

INTO JAPANESE

私がやったとわかる場合は何ですか?

BACK INTO ENGLISH

What if you know what I did?

INTO JAPANESE

どうやったか

BACK INTO ENGLISH

You know how?

INTO JAPANESE

どうやったか?

BACK INTO ENGLISH

You know how?