YOU SAID:

I've done what before?

INTO JAPANESE

私は前に何をやったか。

BACK INTO ENGLISH

What I did before?

INTO JAPANESE

私は前にしたか。

BACK INTO ENGLISH

What I did ago.

INTO JAPANESE

やった前。

BACK INTO ENGLISH

Before I did.

INTO JAPANESE

私より前ね

BACK INTO ENGLISH

Just before I did

INTO JAPANESE

私より前ね

BACK INTO ENGLISH

Just before I did