Use に (or から for organizations) for the sender (e.g., chichi ni okane o moraimashita ).

Used to say you have already finished something (e.g., mou go-ji o sugimashita ). Minna no Nihongo Lesson 7 Fukushuu B Answers (Page 64)

Hai, mou tabemashita (Yes, I have already eaten) OR Iie, mada desu (No, not yet). Study Resources & Extra Practice