Before/After 전에/후에 in Korean

전에/후에

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Overview

The time expressions 전에 (before) and 후에 (after) allow you to sequence events in Korean, a key CEFR A2 pattern. When used with verbs, "before doing" is stem + 기 전에, and "after doing" is stem + (으)ㄴ 후에. They can also follow time nouns directly: 수업 전에 (before class), 수업 후에 (after class).

These expressions are essential for describing routines, giving instructions, and narrating sequences of events. They build on the verb stem and nominalization patterns that become increasingly important at higher levels.

How It Works

Pattern	Formation	Example
Before doing	stem + 기 전에	먹기 전에 (before eating)
After doing	stem + (으)ㄴ 후에	먹은 후에 (after eating)
Before (noun)	noun + 전에	수업 전에 (before class)
After (noun)	noun + 후에	수업 후에 (after class)

Note: 후에 can be replaced with 뒤에 or 다음에 with similar meaning.

Examples in Context

Korean	Romanization	English	Note
먹기 전에 손을 씻어요.	meok-gi jeo-ne so-neul ssi-seo-yo	Wash hands before eating.	verb + 기 전에
자기 전에 책을 읽어요.	ja-gi jeo-ne chae-geul il-geo-yo	(I) read before sleeping.	verb + 기 전에
먹은 후에 나갔어요.	meo-geun hu-e na-ga-sseo-yo	(I) went out after eating.	verb + (으)ㄴ 후에
수업 후에 만나요.	su-eop hu-e man-na-yo	Let's meet after class.	noun + 후에
졸업하기 전에 여행할 거예요.	jo-reo-pa-gi jeo-ne yeo-haeng-hal geo-ye-yo	(I) will travel before graduating.	future plan
운동한 후에 샤워해요.	un-dong-han hu-e sya-wo-hae-yo	(I) shower after exercising.	routine
10분 전에 도착했어요.	sip-bun jeo-ne do-cha-kae-sseo-yo	(I) arrived 10 minutes ago.	time noun
점심 전에 끝내세요.	jeom-sim jeo-ne kkeun-nae-se-yo	Please finish before lunch.	noun + 전에
일주일 후에 올게요.	il-ju-il hu-e ol-ge-yo	(I) will come in a week.	time duration

Common Mistakes

Using past tense with 기 전에

Wrong: 먹었기 전에
Right: 먹기 전에
Why: The action before 전에 has not happened yet, so no past tense is used on the -기 clause.

Forgetting the past modifier -(으)ㄴ with 후에

Wrong: 먹기 후에
Right: 먹은 후에
Why: "After doing" uses the past modifier form because the action is completed before the next event.

Confusing 전 (before/ago) meanings

Wrong: Not recognizing 5분 전에 as "5 minutes ago"
Right: With time durations, 전에 means "ago": 3일 전에 (3 days ago)
Why: 전에 means both "before (doing)" and "ago" depending on context.

Usage Notes

전에 and 후에 are versatile and appear in both casual and formal contexts. In spoken Korean, 후에 is sometimes replaced with the more casual 다음에 (next/after). The particle 에 is sometimes dropped in casual speech: 수업 후 만나요. In formal writing, 이전에 and 이후에 are more common alternatives.