Before and After in Korean: How to Use ~기 전에 and ~(으)ㄴ 후에
If you want to explain what you do before going to work, after eating, or before going to bed, two Korean grammar patterns are especially useful:
~(으)ㄴ 후에 = after doing something
These expressions are useful in everyday Korean because they let you put two actions in a clear time order.
For example:
자기 전에 책을 읽어요.
I read a book before going to bed.
밥을 먹은 후에 커피를 마셔요.
I drink coffee after eating.
The meanings are simple. The important part is learning why Korean uses 기 전에 for “before” but ~(으)ㄴ 후에 for “after.”
Before and After in Korean: The Basic Difference
| Meaning | Pattern | Example |
|---|---|---|
| Before doing | Verb stem + 기 전에 | 먹기 전에 |
| After doing | Verb stem + ~(으)ㄴ 후에 | 먹은 후에 |
Compare:
밥을 먹기 전에 손을 씻어요.
I wash my hands before eating.
밥을 먹은 후에 이를 닦아요.
I brush my teeth after eating.
The same verb, 먹다, becomes 먹기 전에 for “before eating” and 먹은 후에 for “after eating.”
1. How to Use ~기 전에: “Before Doing”
To say that one action happens before another, attach 기 전에 directly to the verb stem.
= before doing...
The formation is straightforward:
먹다 → 먹기 전에 → before eating
가다 → 가기 전에 → before going
자다 → 자기 전에 → before sleeping
공부하다 → 공부하기 전에 → before studying
운동하다 → 운동하기 전에 → before exercising
You do not need to change the verb according to whether its stem ends in a vowel or consonant. Simply attach 기 전에.
Natural Examples with ~기 전에
자기 전에 이를 닦아요.
I brush my teeth before going to bed.
학교에 가기 전에 아침을 먹어요.
I eat breakfast before going to school.
운동하기 전에 스트레칭을 해요.
I stretch before exercising.
한국에 가기 전에 한국어를 조금 공부했어요.
I studied a little Korean before going to Korea.
수업을 듣기 전에 커피를 마셔요.
I drink coffee before class.
2. How to Use ~(으)ㄴ 후에: “After Doing”
To say that something happens after an action has been completed, use ~(으)ㄴ 후에.
= after doing...
One important point: ~(으)ㄴ here is not simply a past-tense ending. It is the form that allows the completed action to modify 후 (“after”).
Verb stem ending in a vowel → ㄴ 후에
가다 → 간 후에
공부하다 → 공부한 후에
운동하다 → 운동한 후에
Verb stem ending in a consonant → 은 후에
먹다 → 먹은 후에
읽다 → 읽은 후에
받다 → 받은 후에
Verb stem ending in ㄹ → remove ㄹ + ㄴ 후에
만들다 → 만든 후에
열다 → 연 후에
Natural Examples with ~(으)ㄴ 후에
밥을 먹은 후에 커피를 마셔요.
I drink coffee after eating.
운동한 후에 샤워해요.
I take a shower after exercising.
수업이 끝난 후에 친구를 만나요.
I meet my friend after class ends.
숙제를 한 후에 게임을 해요.
I play games after doing my homework.
책을 읽은 후에 잠을 잤어요.
I went to sleep after reading the book.
What About Nouns? 전에 and 후에
You do not always need a verb.
When you are talking about a noun such as class, lunch, work, or a meeting, you can often use 전 and 후 directly.
Noun + 후에 = after [noun]
수업 전에 커피를 마셔요.
I drink coffee before class.
수업 후에 도서관에 가요.
I go to the library after class.
점심 전에 전화해 주세요.
Please call me before lunch.
회의 후에 이야기해요.
Let's talk after the meeting.
This gives you two useful ways to express the same general idea:
수업이 끝난 후에 친구를 만나요.
I meet my friend after class ends.
수업 후에 친구를 만나요.
I meet my friend after class.
~기 전에 vs ~(으)ㄴ 후에
The easiest way to understand the difference is to imagine two actions:
If you describe Action A from the perspective of Action B:
B하기 전에 A해요.
I do A before doing B.
If you describe Action B from the perspective of Action A:
A한 후에 B해요.
I do B after doing A.
For example:
밥을 먹기 전에 손을 씻어요.
I wash my hands before eating.
손을 씻은 후에 밥을 먹어요.
I eat after washing my hands.
The sequence is the same. Only the point of view changes.
~(으)ㄴ 후에 vs ~고 나서
You may also hear ~고 나서 when Koreans describe one action happening after another.
Compare:
밥을 먹은 후에 커피를 마셨어요.
I drank coffee after eating.
밥을 먹고 나서 커피를 마셨어요.
I drank coffee after eating.
Both can describe the same sequence.
~(으)ㄴ 후에 is a straightforward way to express “after doing something” and works naturally in both everyday and more structured explanations.
~고 나서 strongly presents the second action as occurring once the first action is finished and is extremely common in everyday descriptions of sequential actions.
As a learner, you do not need to force a sharp English translation difference between the two. First learn to recognise that both can connect completed Action A with the following Action B.
Real-Life Conversation
A: 보통 자기 전에 뭐 해요?
What do you usually do before going to bed?
B: 책을 조금 읽어요. 민수 씨는요?
I read a little. How about you, Minsu?
A: 저는 샤워한 후에 음악을 들어요.
I listen to music after taking a shower.
B: 휴대폰은 안 봐요?
Don't you look at your phone?
A: 자기 전에는 안 보려고 해요.
I try not to look at it before going to bed.
Useful Everyday Patterns
These are worth learning as complete chunks:
자기 전에 — before going to bed
먹기 전에 — before eating
출발하기 전에 — before leaving
한국에 가기 전에 — before going to Korea
수업 전에 — before class
먹은 후에 — after eating
운동한 후에 — after exercising
수업이 끝난 후에 — after class ends
회의 후에 — after the meeting
Common Mistakes
1. 운동기 전에 ❌
운동기 전에 스트레칭해요. ❌
운동하기 전에 스트레칭해요. ✅
운동하다 is a 하다 verb. Remove 다 and attach 기 전에:
운동하다 → 운동하기 전에
2. 운동한 전에 ❌
운동한 전에 샤워해요. ❌
If you mean “before exercising”:
운동하기 전에 ✅
If you mean “after exercising”:
운동한 후에 ✅
3. 먹기 후에 ❌
밥을 먹기 후에 커피를 마셔요. ❌
밥을 먹은 후에 커피를 마셔요. ✅
Do not simply replace 전에 with 후에. The verb form also changes.
4. Using a past-tense sentence before 후에
A common temptation is to build the expression from the ordinary past tense.
Instead, learn the structure as:
가다 → 간 후에
공부하다 → 공부한 후에
Before, After, and “How Long Since?”
Korean has several useful ways to describe the relationship between actions and time.
~기 전에 tells us what happens before an action.
~(으)ㄴ 후에 tells us what happens after an action.
But if you want to say how much time has passed since an action, you need a different pattern:
한국에 오기 전에 한국어를 공부했어요.
I studied Korean before coming to Korea.
한국에 온 후에 한국어를 더 많이 사용했어요.
I used Korean more after coming to Korea.
한국에 온 지 2년 됐어요.
It has been two years since I came to Korea.
For the third pattern, see How to Use ~ㄴ/은 지 in Korean: “How Long Has It Been?”.
Quick Practice
Complete each sentence before checking the answers.
1. 자기 ______ 이를 닦아요. (before)
2. 밥을 ______ 커피를 마셔요. (after eating)
3. 운동하______ 스트레칭을 해요. (before exercising)
4. 수업이 ______ 친구를 만나요. (after class ends)
5. 한국에 ______ 한국어를 공부했어요. (before going)
Show answers
1. 전에
자기 전에 이를 닦아요.
2. 먹은 후에
밥을 먹은 후에 커피를 마셔요.
3. 기 전에
운동하기 전에 스트레칭을 해요.
4. 끝난 후에
수업이 끝난 후에 친구를 만나요.
5. 가기 전에
한국에 가기 전에 한국어를 공부했어요.
Try It Yourself
Think about your own daily routine and complete these sentences:
아침을 먹은 후에 __________.
For example:
자기 전에 책을 읽어요.
I read before going to bed.
아침을 먹은 후에 커피를 마셔요.
I drink coffee after breakfast.
Frequently Asked Questions
How do you say “before doing” in Korean?
Use verb stem + 기 전에.
먹기 전에 = before eating
가기 전에 = before going
자기 전에 = before sleeping
How do you say “after doing” in Korean?
Use verb stem + ~(으)ㄴ 후에.
먹은 후에 = after eating
간 후에 = after going
공부한 후에 = after studying
Can 전에 and 후에 be used with nouns?
Yes. For example:
수업 전에 = before class
수업 후에 = after class
What's the difference between ~(으)ㄴ 후에 and ~고 나서?
Both can describe one action happening after another. ~(으)ㄴ 후에 directly expresses “after doing,” while ~고 나서 presents the next action as occurring after the first action has been completed. In many everyday situations, either can describe the same sequence naturally.
What's the difference between ~기 전에 and ~ㄴ/은 지?
~기 전에 means “before doing something.” ~ㄴ/은 지 is used when talking about how much time has passed since something happened.
Compare:
한국에 오기 전에 한국어를 공부했어요.
I studied Korean before coming to Korea.
한국에 온 지 2년 됐어요.
It has been two years since I came to Korea.
Remember These Two Patterns
= before doing something
Verb + ~(으)ㄴ 후에
= after doing something
Start with one pair:
밥을 먹기 전에 손을 씻어요.
I wash my hands before eating.
밥을 먹은 후에 이를 닦아요.
I brush my teeth after eating.
Once this contrast feels natural, you can use the same patterns with dozens of everyday actions.
Continue Learning Korean
If you are learning how Korean expresses time and sequence, continue with these Korean For You lessons:
- How to Use ~ㄴ/은 지 in Korean: “How Long Has It Been?” — learn how to express how much time has passed since something happened.
- Korean Sentence Structure Guide — review Korean word order and learn how to build longer sentences naturally.