yeoljunghamnida
to be enthusiastic
être passionné
yeoljunghaeyo
I am concentrating
yeoljunghaesseoyo
I concentrated
yeoljunghaetda
yeoljunghal geoyeyo
I will concentrate
yeoljunghal geosida
저는 공부에 열중합니다.
jeoneun gongbue yeoljunhamnida.
I am concentrating on studying.
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