Korean -나 보다 and -은가 보다: Guessing From What You See
Korean -나 보다 guesses from evidence with verbs (비가 오나 봐요), -은가 보다 pairs with adjectives (추운가 봐요), and -는 모양이다 says it appears so — guessing how others feel.
Published:
Written by Alvin Lim Certified Korean Language Teacher (Level 2)
Korean -나 보다 lets you guess from evidence with a verb — 비가 오나 봐요 (it must be raining, judging by the umbrellas) — while adjectives switch to -은가 보다 (추운가 봐요, it seems cold), and -는 모양이다 says “it appears that…” (싸운 모양이에요, looks like they fought). This is how Koreans read a room: not stating facts, but inferring them out loud from a 표정 (facial expression) or the 분위기 (mood). Welcome to the heart of Level-3 nuance — guessing how other people feel and what just happened.
You already met -는 것 같다 for soft guesses. The three new tools here are sharper: they all lean on outside evidence you can actually see or hear. Let’s learn to use your 눈치 (social radar) in Korean.
Ten words for reading the mood
These are the words you reach for when you’re piecing together what someone else is feeling.
How do I guess from what a verb shows? — -나 보다
When the evidence points to an action, attach -나 보다 to a verb stem. You saw something, and you’re inferring the cause out loud.
비가 오나 봐요 = it must be raining (everyone has umbrellas) 두 사람이 싸웠나 봐요 = they seem to have fought (the mood is tense) 밖에 사람이 많나 봐요 = there must be a lot of people outside 아직 안 왔나 봐요 = looks like they haven’t arrived yet
Notice it attaches straight to the verb stem: 오다 → 오나 봐요, 싸우다 (past) → 싸웠나 봐요. The feeling is “based on what I notice, I bet that…” — never a fact you saw directly, always an inference.
What about adjectives? — -은가/ㄴ가 보다
Adjectives (and 이다) can’t take -나 보다. They switch to -은가 보다 after a consonant, -ㄴ가 보다 after a vowel.
날씨가 추운가 봐요 = it seems cold (춥다 → 추운가, ㅂ-irregular) 기분이 안 좋은가 봐요 = they seem to be in a bad mood 저 사람 학생인가 봐요 = that person looks like a student (N + 인가) 요즘 많이 바쁜가 봐요 = they must be really busy these days
So the choice is purely grammatical: verb → -나 보다, adjective → -은가 보다. 좋다 → 좋은가 봐요, 크다 → 큰가 봐요, 학생 → 학생인가 봐요.
A more observed “it appears that…” — -는 모양이다
-는 모양이다 also infers from evidence, but it feels a shade more observed and a shade more written — like you’re describing a visible situation.
다들 바쁜 모양이에요 = everyone appears to be busy 두 사람이 싸운 모양이에요 = it looks like the two of them fought 밖에 비가 오는 모양이에요 = it appears to be raining outside
In speech, 싸웠나 봐요 sounds like a quick guess; 싸운 모양이에요 sounds like you’re calmly reporting what the scene tells you. They’re close enough to swap most of the time.
How is this different from -는 것 같다?
Here’s the line that matters. -나 보다 / -은가 보다 / -는 모양이다 all read outside evidence — something you notice leads you to a conclusion. -는 것 같다 is broader: it covers evidence too, but also your own inner impression, even with no proof. So 화났나 봐요 leans on a visible sign (a slammed door, a cold reply), while 화난 것 같아요 can simply be your gut feeling. When in doubt and there’s clear evidence, the -나 보다 family fits; for a vaguer “I just think so,” -는 것 같다 is safer.
Reading a friend’s mood
Watch all three at work as two classmates puzzle over a third:
See how they layer: 무슨 일 있나 봐요 infers from a verb, 화났나 봐요 guesses the cause, 싸운 모양이에요 reports the visible situation, and 그런가 봐요 softly agrees. None of them states a fact — every line is a careful, evidence-based guess. That restraint is exactly how Level-3 speakers handle other people’s feelings.
FAQ
When do I use -나 보다 versus -은가 보다? It splits by word type. Use -나 보다 with VERBS: 비가 오나 봐요 (it must be raining), 두 사람이 싸웠나 봐요 (they seem to have fought). Use -은가/ㄴ가 보다 with ADJECTIVES and 이다: 추운가 봐요 (it seems cold), 학생인가 봐요 (they look like a student). Both mean you are guessing from evidence you can see or hear — wet umbrellas, a tense mood, an unanswered text. The only trick is matching the form to the part of speech.
What is the difference between -나 보다 and -는 모양이다? They overlap a lot — both are inferences from outside evidence — but -는 모양이다 feels a touch more observed and a touch more written. 싸운 모양이에요 (it appears they fought) reads like you are reporting a visible situation, while 싸웠나 봐요 sounds more like a spontaneous spoken guess. In casual speech -나 보다 is more common; -는 모양이다 shows up in slightly more composed or narrated descriptions. You can often swap them with little change in meaning.
How are these different from -는 것 같다, which I already learned? -나 보다, -은가 보다, and -는 모양이다 all read evidence outside you: you notice something and infer a cause. -는 것 같다 is broader — it covers evidence-based guesses too, but also your own internal impression or opinion, even without clear proof: 이 영화 재미있는 것 같아요 (I think this movie is fun). So 화난 것 같아요 can be just your feeling, while 화났나 봐요 leans on a visible sign that they are angry.
Next: a health & fitness journey — 운동해 왔어요 and -어지다. Previous: apologizing in Korean — -느라고 and -어야겠-. Full path: curriculum hub.