When speaking Korean, there are many ways to express uncertainty or possibility. One essential grammar pattern is ‘-(으)ㄹ지도 모르다’, which means might, may, or could. It’s often used to talk about things that are uncertain or possible, both in everyday conversations and written Korean. In this post, you’ll learn how to use ‘-(으)ㄹ지도 모르다’ naturally, with clear explanations and practical examples.
Contents
1. Definition
‘-(으)ㄹ지도 모르다’ means might, may, or could possibly in English. It is used when the speaker is not certain about something but considers it a real possibility.
2. Form (Structure)
The Korean grammar pattern “-(으)ㄹ지도 모르다” is used to express possibility or uncertainty. It is attached to the verb or adjective stem according to specific rules:
- If the stem ends with a vowel or the consonant ㄹ, add -ㄹ지도 모르다.
- If the stem ends with a consonant other than ㄹ, add -을지도 모르다.
Tense Variations
| Tense | Structure | Example |
| Present/Future | Verb Stem + -(으)ㄹ지도 모르다 | 가다 → 갈지도 몰라요 (It might go / It might happen) |
| Past | Verb Stem + -았/었을지도 모르다 | 가다 → 갔을지도 몰라요 (It might have gone) |
Conjugation Table
| Stem Ending | Structure | Example |
| Vowel-ending stem | Verb Stem + -ㄹ지도 모르다 | 가다 → 갈지도 모르다 (might go) |
| ㄹ 받침 (stem ends in ㄹ) | Verb Stem + -ㄹ지도 모르다 | 살다 → 살지도 모르다 (might live) |
| Other consonant-ending stem | Verb Stem + -을지도 모르다 | 먹다 → 먹을지도 모르다 (might eat) |
For Nouns
- Attach -일지도 모르다 to the noun stem to express possibility.
Example: 의사 → 의사일지도 몰라요 (might be a doctor)
📌 Additional Notes
- The verb 모르다 stays in the present tense regardless of the time frame expressed by the verb.
- The past tense form -았/었을지도 모르다 is used to guess or speculate about events that already happened.
- This structure is mainly used to express uncertainty or possibility, often in future or present contexts but also for past events.
3. Meaning & Usage
This grammar pattern is used when the speaker is expressing possibility or uncertainty about a situation. It softens the tone, making statements less direct and more tentative.
1. Expressing uncertainty about the future
- 내일 비가 올지도 몰라요. (It might rain tomorrow.)
- 시험이 어려울지도 몰라요. (The test might be difficult.)
- 민수가 늦을지도 몰라요. (Minsoo might be late.)
- 가게가 문을 닫았을지도 몰라요. (The store might be closed.)
- 오늘 택배가 안 올지도 몰라요. (The delivery might not come today.)
2. Expressing uncertainty about a current situation
- 지금 회의 중일지도 몰라요. (He might be in a meeting now.)
- 집에 아무도 없을지도 몰라요. (There might be no one at home.)
- 전화기가 꺼져 있을지도 몰라요. (The phone might be off.)
- 아직 도착하지 않았을지도 몰라요. (He might not have arrived yet.)
- 방에 누가 있을지도 몰라요. (Someone might be in the room.)
3. Speculating about past events (using past tense forms)
- 어제 늦게 잤을지도 몰라요. (He might have gone to bed late yesterday.)
- 길을 잃었을지도 몰라요. (He might have gotten lost.)
- 벌써 떠났을지도 몰라요. (They might have already left.)
- 전화를 못 봤을지도 몰라요. (He might have missed the call.)
- 기차를 놓쳤을지도 몰라요. (He might have missed the train.)
4. Using with adjectives
- 비행기 표가 비쌀지도 몰라요. (The plane ticket might be expensive.)
- 음식이 맛없을지도 몰라요. (The food might not taste good.)
- 날씨가 추울지도 몰라요. (The weather might be cold.)
- 그 영화가 지루할지도 몰라요. (The movie might be boring.)
- 길이 복잡할지도 몰라요. (The road might be complicated.)
5. Using with nouns
- 그 사람이 의사일지도 몰라요. (That person might be a doctor.)
- 이건 가짜일지도 몰라요. (This might be fake.)
- 저 분이 선생님일지도 몰라요. (That person might be a teacher.)
- 오늘이 마지막 수업일지도 몰라요. (Today might be the last class.)
- 이게 중요한 단서일지도 몰라요. (This might be an important clue.)
4. Key Points to Remember
- Use this grammar pattern only to express possibility or uncertainty.
- It can be used to talk about past, present, or future situations.
- Attach -일지도 모르다 to nouns.
- Use -았/었을지도 모르다 for past tense verbs to speculate about past events.
- This pattern softens the tone, making statements less direct and more tentative.
5. Practice Exercises
Fill in the blanks with the correct form of ‘-(으)ㄹ지도 모르다’.
- 오늘은 날씨가 많이 (춥다) __________.
(It might be very cold today.) - 민수가 아직도 (자다) __________.
(Minsoo might still be sleeping.) - 그 사람이 선생님(이다) __________.
(That person might be a teacher.) - 내일 시험이 너무 (어렵다) __________.
(The test tomorrow might be too difficult.) - 친구가 길을 (잃다) __________.
(My friend might be lost.) - 그 가게는 문을 (닫다) __________.
(That store might be closed.) - 그 영화가 좀 (지루하다) __________.
(That movie might be a bit boring.) - 이거는 가짜(이다) __________.
(This might be fake.) - 내일 비가 (오다) __________.
(It might rain tomorrow.) - 택배가 오늘 (안 오다) __________.
(The delivery might not come today.)
6. Answers
- 추울지도 몰라요
- 자고 있을지도 몰라요
- 선생님일지도 몰라요
- 어려울지도 몰라요
- 잃었을지도 몰라요
- 닫았을지도 몰라요
- 지루할지도 몰라요
- 가짜일지도 몰라요
- 올지도 몰라요
- 안 올지도 몰라요
7. Common Mistakes and Tips
⚠️ Mistake 1: Using present tense after past context
Incorrect: 어제 비가 올지도 몰라요. ❌
Correct: 어제 비가 왔을지도 몰라요. ✅
💡 Tip: Use ‘-았/었을지도 모르다’ when referring to uncertain past events.
⚠️ Mistake 2: Using ‘일지도 모르다’ after a verb or adjective
Incorrect: 가일지도 몰라요. ❌
Correct: 갈지도 몰라요. ✅
💡 Tip: Only use ‘일지도 모르다’ after nouns. For verbs and adjectives, use the proper conjugation.
⚠️ Mistake 3: Forgetting to add ‘을/ㄹ’
Incorrect: 집에 없지도 몰라요. ❌
Correct: 집에 없을지도 몰라요. ✅
💡 Tip: Always attach ‘-(으)ㄹ지도’ to the future base form of the verb or adjective.
The grammar pattern ‘-(으)ㄹ지도 모르다’ is an essential structure for expressing possibility and uncertainty in Korean. It allows learners to communicate with nuance and avoids overly direct statements. Understanding how to use this pattern properly will help students sound more polite and natural in real-life Korean conversations.