Breakdown of oneureun nalssiga malgaseo changmuneul yeoreosseoyo.
~을~eul
object particle
~가~ga
subject particle
~은~eun
topic particle
오늘oneul
today
날씨nalssi
weather
열다yeolda
to open
창문changmun
window
맑다malgda
clear
~아서~aseo
so
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