This is the 5048th most frequent Korean word.
김선미는
"김선미는" means "Kim Sun-mi is" or "As for Kim Sun-mi," indicating the topic marker in Korean.
Here, '김선미는' is used as the subject of the sentence to indicate who is performing the action, showing their diligent nature in studying.
김선미는 공부를 열심히 하고 있습니다.
Kim Sun-mi is studying diligently.
In this sentence, '김선미는' again serves as the subject, highlighting the person engaged in the activity at the park with friends.
김선미는 친구들과 공원에서 놀고 있다.
Kim Sun-mi is playing at the park with friends.
'김선미는' introduces the person being discussed, establishing a preference for reading books.