daehoee chamgaharyeomyeon pilsu seoryureul jechulhaeya hae.

If you want to participate in the competition, you have to submit the required documents.

Breakdown of daehoee chamgaharyeomyeon pilsu seoryureul jechulhaeya hae.

• ~에: destination particle
• ~를: object particle
• 해야 하다: to have to
• ~으려면: if one wants to
• 서류: document
• 제출하다: to submit
• 대회: competition
• 참가하다: to participate
• 필수: required

Questions & Answers about daehoee chamgaharyeomyeon pilsu seoryureul jechulhaeya hae.

What is the function of -에 in 대회에?

In Korean, -에 is a particle marking time, place, direction, or target. Here:

• 대회 = competition
• 에 indicates the event you’re joining
  So 대회에 참가하다 literally means “to participate in [the competition].”

How is 참가하려면 constructed, and what does -려면 mean?

Breakdown:

1. 참가하다 (to participate) → stem 참가하-
2. Add -려면, a conditional connector meaning “if (one) intends/wants to…”
   Result: 참가하려면 = “if you want to participate.” It sets up the condition for the next clause.

Why use 필수 서류 instead of just 서류? What does 필수 mean?

• 서류 = documents
• 필수 = essential or mandatory (Sino-Korean adjective)
  Together, 필수 서류 means “required documents,” emphasizing these are documents you absolutely must submit.

What’s the difference between 필수 서류 and 필요한 서류?

• 필수 서류 is more formal and highlights an official requirement.
• 필요한 서류 (“necessary documents”) comes from 필요하다 (to be necessary) and is more descriptive.
  In practice, official notices often use 필수 서류, while 필요한 서류 appears in everyday explanations.

How does 제출해야 해 express obligation, and how is it formed?

This is the “must/have to” construction:

1. 제출하다 (to submit) → stem 제출- (drop -하-)
2. Add -해야 하다 → 제출해야 하다
3. In casual speech, -해야 하다 becomes -해야 해
   So 제출해야 해 = “You have to submit.”

Can I say 제출해야 돼 instead of 제출해야 해? Any difference?

Yes—both mean “have to submit.”

• 제출해야 해 comes from -해야 하다
• 제출해야 돼 comes from -해야 되다
  Nuance: -돼 is a bit more colloquial; -해 can feel slightly softer. Both are perfectly natural in speech.

How would you make this sentence more polite or formal?

Adjust verb endings and add honorifics:
• Polite:
대회에 참가하려면 필수 서류를 제출해야 해요.
• Formal/deferential:
대회에 참가하시려면 필수 서류를 제출해야 합니다.
Notes:

• -요 adds polite tone.
• -습니다/합니다 is formal.
• -시- is the honorific marker for respect.

Why is 서류를 marked with 를 and not 가?

를/을 is the object marker for transitive verbs, showing what’s directly affected by the action.

• 제출하다 is transitive (you submit something).
• 서류 is the item being submitted.
  Hence, 서류를 제출해야 해 uses 를 to mark the direct object.