-겠-: Intention and Conjecture | Korean Grammar

Beginners are often told -겠- is "the future tense," and then get baffled when 맛있겠어요 turns out to mean "that must look delicious" — nothing future about it. The fix is to stop calling -겠- a tense. It is a modal marker: it expresses the speaker's stance toward an action or state — either "I intend to" or "I'd guess that." Which of those two you get depends heavily on who the subject is. This page sorts out its three jobs and, crucially, keeps it apart from the neutral scheduled future -(으)ㄹ 거예요.

Where -겠- sits: a pre-final marker

-겠- is not a sentence ending. It slots before the final ending, in the same pre-final position as the past -었- and the honorific -시-, and the real ending comes after it: 하-겠-어요, 하-겠-습니다. It can even stack with those neighbors — 하-시-겠-어요 (honorific + 겠), 좋-았-겠-어요 (past + 겠). Think of it as a modal layer you insert, not a form that replaces the verb's ending.

어떻게 하시겠어요?

eotteoke hasigesseoyo?

How would you like to proceed? (honorific -시- + -겠-, service register)

Job 1 — Intention and volition (usually 1st person)

With a first-person subject, -겠- announces the speaker's will: "I will, I'm going to, let me." It is firmer and more committed than a neutral statement of plans, which is why it dominates promises, offers, and formal declarations.

제가 가겠습니다.

jega gagetseumnida

I'll go. (I volunteer / I commit to going.)

오늘 발표는 제가 하겠습니다.

oneul balpyoneun jega hagetseumnida

I'll give today's presentation.

자세한 내용은 다시 연락하겠습니다.

jasehan naeyong-eun dasi yeollakagetseumnida

I'll get back to you with the details. (formal)

저 이만 가 보겠습니다.

jeo iman ga bogetseumnida

I'll be heading off now. (polite leave-taking)

💡

First-person -겠- is a commitment device. 제가 하겠습니다 doesn't just predict that I'll do it — it pledges it. That is why interviews, workplaces, and the military lean on it: it sounds resolute and responsible.

Job 2 — Conjecture and inference (usually 2nd/3rd person, states)

Point -겠- at someone or something other than yourself — another person, the weather, a situation — and the meaning flips to educated guess: "must be, looks like, is probably." You are inferring from evidence in front of you.

와, 이거 진짜 맛있겠어요.

wa, igeo jinjja masitgesseoyo

Wow, this must be delicious.

하늘 보니까 오늘 춥겠어요.

haneul bonikka oneul chupgesseoyo

Judging by the sky, it's going to be cold today.

내일은 전국에 비가 오겠습니다.

naeireun jeon-guge biga ogetseumnida

Tomorrow it will rain nationwide. (weather-forecast register)

That last example is the forecaster's voice: -겠- lets them predict without claiming certainty, which is exactly why weather reports are full of it.

The empathy use

A very common, very human subtype of conjecture is empathy — inferring how someone else must feel, to show you care.

아침도 못 먹었어요? 배고프겠어요.

achimdo mot meogeosseoyo? baegopeugesseoyo

You didn't even have breakfast? You must be starving.

일이 너무 많아서 힘들겠어요.

iri neomu manaseo himdeulgesseoyo

You've got so much work — that must be rough.

어제 밤새 일했어요? 정말 힘들었겠어요.

eoje bamsae ilhaesseoyo? jeongmal himdeureotgesseoyo

You worked all night? That must have been really tough. (past + -겠-)

Notice 힘들었겠어요: past -었- plus -겠- gives "must have been" — a guess about the past. This "-았/었겠-" combination is the standard way to conjecture backward in time.

Who is the subject? That's the whole decision

The same -겠- reads as intention or conjecture almost entirely by person:

Subject	Reading	Example	Meaning
I / we (1st)	intention	제가 하겠어요	I'll do it.
you / he / it (2nd/3rd)	conjecture	많이 힘들겠어요	That must be hard.
weather / states	conjecture	비가 오겠어요	It'll probably rain.

You would not normally say 제가 배고프겠어요 to guess at your own hunger — you know whether you're hungry, so it's just 배고파요. And you would not say 그 사람이 가겠습니다 to mean he has resolved to go, because you can't pledge someone else's will. Intention needs a first-person doer; conjecture takes everyone else.

Job 3 — Frozen set phrases

A handful of extremely common expressions are lexicalized -겠- forms. Learn them whole; don't parse them.

네, 알겠습니다.

ne, algetseumnida

Yes, understood. (I'll take that on board)

글쎄요, 잘 모르겠어요.

geulsseyo, jal moreugesseoyo

Hmm, I'm not really sure.

처음 뵙겠습니다.

cheoeum boepgetseumnida

Nice to meet you (for the first time).

잘 먹겠습니다.

jal meokgetseumnida

Thank you for the food. (said before eating)

The softening 겠 in 알겠습니다 and 모르겠어요 is why they feel gentler than the bald 압니다 / 몰라요: the -겠- adds a "as far as I can tell" hedge that makes them sound considerate rather than blunt.

The key contrast: -겠- vs. -(으)ㄹ 거예요

Here is the distinction English "will" flattens. English "will" covers intention (I'll help), prediction (it'll rain), and neutral scheduled facts (the bus will come at 3). Korean splits these. Intention and inference go to -겠-; a plain, scheduled, uncontroversial future goes to -(으)ㄹ 거예요.

버스는 세 시에 올 거예요.

beoseuneun se sie ol geoyeyo

The bus will come at three. (neutral scheduled fact — not -겠-)

이번 주말에는 비가 올 거예요.

ibeon jumareneun biga ol geoyeyo

It's going to rain this weekend. (plain expectation)

Saying ×버스는 세 시에 오겠어요 for a timetable sounds off — it turns a bus schedule into either the bus's "intention" or your on-the-spot guess. For a settled fact you're simply reporting, use -(으)ㄹ 거예요. Reserve -겠- for I pledge or I infer. For the full side-by-side, see -겠- vs. -(으)ㄹ 거예요.

💡

Two-question filter. (1) Is it my will? → -겠- (제가 하겠습니다). (2) Am I guessing from evidence? → -겠- (춥겠어요). If it's neither — just a neutral scheduled future you're reporting — use -(으)ㄹ 거예요, not -겠-.

Common Mistakes

1. Using -겠- for a neutral planned future. A timetable or settled plan you're merely reporting takes -(으)ㄹ 거예요.

❌ 기차는 열 시에 출발하겠어요.

Wrong register — a scheduled departure isn't your intention or a guess; use 출발할 거예요.

✅ 기차는 열 시에 출발할 거예요.

gichaneun yeol sie chulbalhal geoyeyo

The train will depart at ten.

2. Reading every -겠- as future time. 맛있겠어요 is a present inference ("that looks delicious now"), not "it will be delicious."

✅ 음식 냄새 좋네요. 진짜 맛있겠어요.

eumsik naemsae jonneyo. jinjja masitgesseoyo

The food smells great. This must be delicious. (present conjecture)

3. Conjecturing about your own feelings. You don't guess at your own hunger or fatigue with -겠-; state it plainly.

❌ 저는 지금 너무 배고프겠어요.

Odd — you know your own hunger, so it's not a guess; say 배고파요.

✅ 저는 지금 너무 배고파요.

jeoneun jigeum neomu baegopayo

I'm so hungry right now.

4. Pledging someone else's will with 1st-person intention -겠-. You can commit only your own action; for someone else's likely action, that's conjecture or the plain future.

✅ 그 사람도 아마 오겠어요.

geu saramdo ama ogesseoyo

He'll probably come too. (conjecture about a 3rd person, not his pledge)

Key Takeaways

-겠- is a modal pre-final marker, not a tense; it sits before the ending and can stack with -시- and -었-.
Intention/volition with a 1st-person subject: 제가 하겠습니다 (a commitment, not just a plan).
Conjecture/inference with 2nd/3rd person or states: 맛있겠어요, 비가 오겠어요, 힘들겠어요 (incl. empathy).
-았/었겠- conjectures about the past: 힘들었겠어요 "must have been hard."
Frozen phrases: 알겠습니다, 모르겠어요, 처음 뵙겠습니다, 잘 먹겠습니다.
For a neutral scheduled future, use -(으)ㄹ 거예요, not -겠- (버스는 세 시에 올 거예요).

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