Korean phrase
~ 언제까지 반납해야 하나요? ~ eon je kka ji pan na pae ya ha na yo
Meaning
By when do I need to return ___?
When to use it
This politely asks for the deadline for returning an item. It is used for borrowed items such as books and has a gentle, considerate tone.
Example dialogue
책을 언제까지 반납해야 하나요? chae geul eon je kka ji pan na pae ya ha na yo
By when do I need to return the book?
다음 주 금요일까지 반납하시면 됩니다. ta eum chu keu myo il kka ji pan na pa si myeon toem ni da
It is fine if you return it by next Friday.