Conditional -(으)면 in Korean

In Brief

Attach -면 to a verb or adjective stem ending in a vowel or ㄹ, and -으면 after most other final consonants: 가면 “if/when someone goes,” 살면 “if/when someone lives,” and 먹으면 “if/when someone eats.” The same Korean form can correspond to either English if or when; context tells you whether the condition is uncertain or expected.

Overview

-(으)면 connects a condition to its result. A condition is the circumstance that must be true first: in 시간이 있으면 가요, “having time” is the condition and “going” is the result. Korean uses this one highly frequent ending for English ideas such as if, when, and sometimes whenever.

This is an A2 pattern, but it quickly becomes part of everyday Korean. You can use it to discuss plans, give instructions, ask about future events, state general truths, and describe an imagined situation. It works with action verbs such as 가다 “to go,” descriptive verbs (words that express qualities, often translated by English adjectives) such as 춥다 “to be cold,” and the copula 이다 “to be.”

For an English-speaking learner, the biggest adjustment is not the meaning but the sentence structure. English places a separate word—if or when—before a full clause. Korean adds -(으)면 directly to the stem of the final predicate in the condition clause. The conditional clause normally comes before the result, and Korean often leaves out subjects that are clear from context.

How It Works

The basic sentence pattern

A stem is the part left after removing dictionary-form -다. Add the conditional ending to that stem:

condition + -(으)면 + result

• 가다 → 가- + 면 → 가면 — if/when someone goes
• 먹다 → 먹- + 으면 → 먹으면 — if/when someone eats
• 바쁘다 → 바쁘- + 면 → 바쁘면 — if/when someone is busy

The result clause can end in any suitable speech level. At the beginner stage, the polite -아/어요 style is the most useful: 가면 전화해요 “Call when you arrive” or “If you go, call.” The politeness ending belongs at the end of the whole sentence, not inside -(으)면.

Choosing -면 or -으면

Stem ending	Ending	Dictionary form	Conditional form	Meaning
Vowel	-면	가다	가면	if/when someone goes
ㄹ	-면	살다	살면	if/when someone lives
Other consonant	-으면	먹다	먹으면	if/when someone eats
Other consonant	-으면	좋다	좋으면	if something is good

A final ㄹ remains in place: 알다 → 알면, 만들다 → 만들면, 길다 → 길면. Do not add 으 after it.

Verbs, descriptive verbs, and 있다/없다

The attachment rule does not change according to whether English uses a verb or an adjective:

Type	Form	Example
Action	오다 → 오면	친구가 오면 같이 먹어요. — If my friend comes, we eat together.
Quality/state	비싸다 → 비싸면	너무 비싸면 안 사요. — If it is too expensive, I do not buy it.
Existence/possession	있다 → 있으면	시간이 있으면 만나요. — If you have time, let’s meet.
Nonexistence	없다 → 없으면	우산이 없으면 이걸 쓰세요. — If you do not have an umbrella, use this one.

Nouns: -(이)면

After a noun, use the copula’s conditional form -(이)면, meaning “if it is” or “if someone is.” Use -이면 after a consonant and -면 after a vowel.

Noun ending	Form	Example	Meaning
Consonant	-이면	학생이면	if someone is a student
Vowel	-면	의사면	if someone is a doctor

In careful analysis, 학생이면 is 학생 + 이다 + -면. In ordinary learning, it is easiest to remember it as the noun pattern -(이)면.

Negative conditions

Negation works in the usual way. Put 안 before the predicate, or use the longer -지 않다 form and attach -(으)면 to 않다:

• 안 가면 — if someone does not go
• 가지 않으면 — if someone does not go
• 모르다 → 모르면 — if someone does not know
• 없으면 — if there is not / if someone does not have

모르면 물어보세요 therefore literally follows the pattern “if [you] do not know, please ask.” Korean does not require the pronoun you when the situation makes it obvious.

Common stem changes

Some irregular stems change before a vowel-initial ending such as -으면. These are the same stem patterns found with many other Korean endings.

Dictionary form	Conditional	Meaning	What happens
듣다	들으면	if someone listens/hears	ㄷ changes to ㄹ
걷다	걸으면	if someone walks	ㄷ changes to ㄹ
돕다	도우면	if someone helps	ㅂ changes to 우
춥다	추우면	if it is cold	ㅂ changes to 우
짓다	지으면	if someone builds	ㅅ disappears
낫다	나으면	if something gets better	ㅅ disappears
하다	하면	if someone does	regular contraction

Not every word with these consonants is irregular. For example, 받다 → 받으면, 입다 → 입으면, and 웃다 → 웃으면 keep their consonants. Learn the conditional alongside each new irregular verb rather than guessing from spelling alone.

If, when, or whenever?

Korean does not force the speaker to choose between English if and when.

• 비가 오면 집에 있을 거예요. — If it rains, I will stay home. The rain is uncertain.
• 졸업하면 뭐 할 거예요? — What will you do when you graduate? Graduation is treated as expected.
• 피곤하면 일찍 자요. — When(ever) I am tired, I go to bed early. This describes a repeated pattern.

Choose the natural English translation from the situation. Do not assume that every -(으)면 must be translated with if.

Time and tense

For an ordinary future condition, Korean usually leaves the condition predicate unmarked for future time. The result clause or a time word makes the timing clear:

• 내일 비가 오면 집에 있을 거예요. — If it rains tomorrow, I will stay home.

English also commonly uses present tense after if, so this pattern may feel familiar. A past marker can appear before -(으)면 when the condition itself is viewed as completed: 도착했으면 전화하세요 “If you have arrived, please call.” Past-marked conditionals also have hypothetical uses discussed below.

Examples in Context

Korean	English	Note
시간이 있으면 가요.	If I have time, I’ll go.	있다 → 있으면
비가 오면 집에 있을 거예요.	If it rains, I will stay home.	Future result; no future marking in the condition
모르면 물어보세요.	If you don’t know, please ask.	Negative condition followed by a polite request
졸업하면 뭐 할 거예요?	What will you do when you graduate?	Expected event: English “when”
집에 도착하면 메시지를 보내 주세요.	Please send me a message when you get home.	Instruction tied to a future event
날씨가 좋으면 공원에서 만나요.	If the weather is nice, let’s meet in the park.	Descriptive verb 좋다
지하철을 타면 더 빨라요.	If you take the subway, it is faster.	Practical recommendation
매운 음식을 먹으면 배가 아파요.	When I eat spicy food, my stomach hurts.	Habitual cause and result
학생이면 할인을 받을 수 있어요.	If you are a student, you can get a discount.	Noun + -이면
의사면 이 증상을 알 거예요.	If they are a doctor, they will know this symptom.	Vowel-ending noun + -면
추우면 창문을 닫으세요.	If you are cold, close the window.	Irregular 춥다 → 추우면
음악을 들으면 마음이 편해져요.	When I listen to music, I feel calmer.	Irregular 듣다 → 들으면
주말이 되면 사람이 많아요.	When the weekend comes, there are many people.	Regular, predictable occurrence
약을 먹으면 곧 나을 거예요.	If you take the medicine, you will get better soon.	낫다 → 나을 거예요 appears in the result

Common Mistakes

Adding -으면 after a vowel

• Wrong: 가으면 연락하세요.
• Right: 가면 연락하세요.
• Why: The stem 가- ends in a vowel, so it takes -면, not -으면.

Adding 으 after final ㄹ

• Wrong: 서울에 살으면 편해요.
• Right: 서울에 살면 편해요.
• Why: Stems ending in ㄹ take -면 directly. The ㄹ stays: 살다 → 살면.

Attaching the ending to the full dictionary form

• Wrong: 먹다면 배가 불러요.
• Right: 먹으면 배가 불러요.
• Why: Remove dictionary -다 first. The stem 먹- ends in a consonant, so add -으면.

Putting politeness inside the condition

• Wrong: 시간이 있어요면 같이 가요.
• Right: 시간이 있으면 같이 가요.
• Why: Attach -(으)면 to the stem 있-. The final result clause carries the sentence’s polite ending.

Translating every form as “if”

• Awkward: When graduation is uncertain, what will you do if you graduate? for 졸업하면 뭐 할 거예요?
• Natural: What will you do when you graduate?
• Why: -(으)면 covers both if and when. Whether the event is uncertain, expected, or repeated comes from context.

Using the regular stem instead of an irregular form

• Wrong: 음악을 듣으면 기분이 좋아요.
• Right: 음악을 들으면 기분이 좋아요.
• Why: Irregular 듣다 changes ㄷ to ㄹ before -으면.

Usage Notes

The condition normally comes first

The natural default is condition followed by result: 시간이 있으면 만나요. In conversation, the result may come first as an afterthought—만나요, 시간이 있으면—but learners should build the condition-first pattern until it feels automatic.

Subjects depend on context

The two clauses can have the same subject or different subjects. Korean does not need to repeat a clear subject:

• 제가 시간이 있으면 갈게요. — If I have time, I’ll go.
• 비가 오면 우리는 안 갈 거예요. — If it rains, we will not go.

Particles and context, not -(으)면 itself, show who performs each action. Add a subject when omission would create genuine ambiguity.

만약 adds emphasis, not a requirement

만약 means roughly “if” or “supposing.” It often appears at the beginning of a more explicitly hypothetical condition:

• 만약 시간이 없으면 내일 해도 돼요. — If you happen not to have time, you can do it tomorrow.

The sentence remains grammatical without 만약. Do not treat it as a mandatory partner of -(으)면.

Commands and suggestions are natural in the result

A result clause can be a statement, question, request, command, or suggestion:

• 피곤하면 쉬세요. — If you are tired, rest.
• 시간이 있으면 같이 갈까요? — If you have time, shall we go together?

This flexibility makes -(으)면 especially useful in everyday instructions and advice.

Beyond the Basics / Advanced Use

You do not need to master all of these patterns at A2, but they are common extensions of the same conditional idea.

-면 되다: “all you need to do is”

-면 되다 literally presents an action as a sufficient condition: if you do it, things “work out.” In natural English it often means “you just need to,” “you can,” or “it is enough to.”

• 여기에 이름을 쓰면 돼요. — You just need to write your name here.
• 몇 시까지 오면 돼요? — By what time should I come?

This construction is frequently used to explain procedures and ask what is required.

-면 안 되다: “must not”

With 안 되다, the condition is unacceptable:

• 여기에서 사진을 찍으면 안 돼요. — You must not take pictures here.
• 약속을 잊으면 안 돼요. — You must not forget the appointment.

Although the literal structure resembles “if you do it, it does not work,” learn the whole pattern as a prohibition.

-았/었으면 좋겠다: wishes and hoped-for outcomes

A past-looking form before -면 often creates distance from reality rather than simply locating an event in the past. With 좋겠다, it expresses a wish:

• 내일 날씨가 좋았으면 좋겠어요. — I hope the weather is nice tomorrow.
• 한국에 다시 갔으면 좋겠어요. — I wish I could go to Korea again.

The doubled-looking structure is normal Korean. It is not translated word for word as a past condition in English.

Counterfactual conditions

A counterfactual condition describes something contrary to fact or imagines a different reality. Context and past marking can give -(으)면 this meaning:

• 시간이 더 있었으면 끝냈을 거예요. — If I had had more time, I would have finished it.

More advanced Korean may use -았/었더라면 to mark this unreal past meaning more explicitly: 시간이 더 있었더라면.... At A2, focus first on ordinary real and future conditions.

Contrast with -아/어도 and -든(지)

Korean	English	Note
비가 오면 안 가요.	If it rains, I won’t go.	The result depends on the condition.
비가 와도 가요.	I go even if it rains.	-아/어도 says the condition does not change the result.
비가 오든 눈이 오든 가요.	I go whether it rains or snows.	-든(지) treats the alternatives as irrelevant.

This contrast is useful: -(으)면 makes the result conditional, while the later patterns emphasize that the result stays the same despite the condition or choice.

Practice Tips

1. Sort stems by their final sound. Take ten familiar dictionary forms, remove -다, and make three groups: vowel + -면, ㄹ + -면, and other consonant + -으면. Say each result aloud.
2. Build two-clause chains from daily life. Complete prompts such as 시간이 있으면..., 피곤하면..., and 주말이 되면... with a realistic result. Then change a statement into a question, request, or suggestion.
3. Translate by meaning, not by one fixed word. When you notice -(으)면 in Korean, ask whether the event is uncertain, expected, or habitual. Translate it as if, when, or whenever accordingly.

Related Concepts

• Prerequisite: Polite Ending -아/어요 — use this everyday speech level to finish polite conditional sentences.
• Next step: Even if -아/어도 — express that the result remains true despite a condition.
• Next step: Regardless -든(지) — express “whether,” “any,” or indifference between alternatives.