I didn't realize that
Mir war nicht klar, daß ihr das schon getan hattet.
I wasn’t aware that you had already done that.
Mir war nicht klar, daß du das schon erledigt hattest.
I didn't realize you'd already taken care of it.
Mir war nicht klar, daß ihr solchen Hunger habt.
I didn’t realize you were that hungry.
Mir war nicht klar, daß Sie das schon erledigt hatten.
I wasn’t aware that you had already taken care of it.