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-으면
Reference material by Wiktionary contributors. This retains its source identity and is not 411 news reporting.
Korean
Alternative forms
ko -면 after vowels and ko ㄹ
Etymology
From ko okm - -으〮면〮/ᄋᆞ〮면〮 -úmyén/ómyén, a Middle Korean innovation from ko oko 㢱 *-mye adverb-deriving suffix + oko 隱 *-n topic marker.ko 남풍현 (Nam Pung-hyeon) ko:조건법 연결어미 '-면'의 발달 The development of the conditional suffix -myen Gugyeol Yeon'gu 2000 6 11–40 Modern speakers do not perceive it as such.
Pronunciation
Suffix
if, when
ko 꼬리-가 길면 밟힌다. One's evil deeds will eventually be discovered. If one's tail is long, it will be stepped on.
ko 그분-이 가시면, 저-도 가겠습니다. If he goes, I will also go.
ko 봄-이 오면, 꽃-이 핀다. When spring comes, flowers blossom.
Usage notes
Unlike most suffixes with epenthetic ko 으, this suffix does not cause elision of ko ㄹ, as its starting consonant is ko ㅁ: ko 울면 if one cries, not ko *우면.
when sense is only used with ko -으면 and never with other variants such as ko -는다면, as they show less possibility of a certain action happening.
References
ko inflectional suffixes