to friend - 숙제 해 숙제 is homework 해 is do ! a one-on-one talk "your" is not really mean in korean if you wanna talk this... "너 숙제 해" 너=your to adult and Stranger - 숙제 하세요 숙제 is homework 하세요 is do :-) we have to Honorific expression for adult and Stranger ! at that time, use this at the end "요"