에: Going Somewhere, and Being Somewhere

에 marks a place — either where something is, or where something is heading.

The whole difficulty is separating it from 에서, so let us do that first.

The rule

에 — where something is, or where it is going. No action happens there.
에서 — where an action takes place.

학교에 가요.        I go to school.        (destination)
학교에 있어요.      I'm at school.         (existence)
학교에서 공부해요.  I study at school.     (action)

Same place, three sentences, and the particle changes with what the verb is doing.

Test it by asking: is something happening at this place, or is the place just where things are?

Destinations

Verbs of movement take 에:

• 학교에 가요 — I go to school.
• 한국에 왔어요 — I came to Korea.
• 집에 돌아가요 — I’m going back home.

The place is the endpoint, not the stage.

Existence

있다 and 없다 take 에, and this catches English speakers because English says at:

집에 있어요.      ✅  I'm at home.
집에서 있어요.    ❌

있다 is not an action. Nothing is being done — something simply exists in a location. That is precisely what 에 is for.

The same goes for putting things places:

• 책상에 놓았어요 — I put it on the desk.
• 가방에 넣었어요 — I put it in my bag.

Where 에서 takes over

The moment the verb is an activity, switch:

Eating, working, exercising — things you do. 에서 covers the rest of its behaviour, including its second job marking where you came from.

Time takes 에 too

Same particle, different dimension:

• 세 시에 만나요 — Let’s meet at three.
• 월요일에 가요 — I’m going on Monday.
• 2026년에 왔어요 — I came in 2026.

One wrinkle worth knowing now: 오늘, 내일, 어제, 지금, 매일 refuse 에.

오늘에 갔어요.   ❌
오늘 갔어요.     ✅

There is no rule to derive — these words simply do not take it. Memorise the short list and move on.

Not for people

Places take 에. People take 에게, 한테.

친구에 말했어요.     ❌
친구한테 말했어요.   ✅
학교에 갔어요.       ✅

An organisation counts as a place: 회사에 이메일을 보냈어요. Name the person and it flips: 팀장님께 보냈어요.

How you travel is not 에: 학교에 지하철로 가요 — destination (장소)에, means (으)로.

Dropping it

In casual speech, 에 often disappears:

집 가요 — Going home.
어디 가요? — Where are you going?

Completely normal. But keep it while you are still building the 에 / 에서 distinction, because dropping the particle hides the very thing you are trying to learn.