Breakdown of hakgi deungrogeun geumyoilkkaji haeya haeyo.
~은~eun
topic particle
~까지~kkaji
limit particle
해야 하다haeya hada
to have to
금요일geumyoil
Friday
Questions & Answers about hakgi deungrogeun geumyoilkkaji haeya haeyo.
Who is the implied subject in 학기 등록은 금요일까지 해야 해요?
In Korean, subjects are often omitted when they’re clear from context. Here there is no explicit I or you—it’s a general instruction. Usually the implied subject is you (e.g. students) if a professor is talking, or we if a team is reminding itself. Without extra context, it simply means “(You) have to register for the semester by Friday.”
Why does 학기 등록 take the topic marker -은 instead of the object marker -을? What’s the nuance difference?
Korean particles mark the role of nouns.
- -은 is the topic marker, signaling “as for semester registration …,” often highlighting or contrasting it.
- -을 is the object marker, marking a direct object of the verb.
Both are grammatically possible:
• 학기 등록은 금요일까지 해야 해요 (“As for semester registration, it must be done by Friday.”)
• 학기 등록을 금요일까지 해야 해요 (“You must register for the semester by Friday.”)
Using 은 gives a slightly more “topic-comment” feel, whereas 을 is more straightforwardly “action-on-object.”
What does 까지 mean in 금요일까지, and how is it different from 전에 or just 금요일에?
까지 literally means “up to (and including)” a point.
- 금요일까지 = “until Friday” or “by Friday” (you can do it on Friday itself).