민수는

민수는

"민수는" means "Minsu is" or "As for Minsu" in English.

Here, '민수는' is used as the subject of the sentence, indicating that Minsu is the one performing the action of going to school.

민수는 학교에 갔어요.

Minsu went to school.

In this sentence, '민수는' serves as the subject, showing that Minsu is the person who likes exercising.

민수는 운동을 좋아해요.

Minsu likes exercise.

Here, '민수는' acts as the subject, specifying that Minsu is able to play the piano.

민수는 피아노를 칠 수 있어요.

Minsu can play the piano.