Usages of mun
새로 문을 연 책방을 아직 안 가 봤어.saero muneul yeon chaekbangeul ajik an ga bwasseo.
I haven’t been to the newly opened bookstore yet.
문을 열어요.muneul yeoreoyo.
I open the door.
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We have an entire course teaching Korean grammar and vocabulary.