STUDENT'S HOMEWORK:
My friends are ye won, minji, hyoun jung, chae yun and ha youn.

TEACHER'S CORRECTION:
My friends are Ye won, Minji, Hyoun jung, Chae yun and Ha youn.


EXPLANATION:
We need to capitalize a proper noun or the names  of the person.

NOTE:
I appreciate your sentence about the names of your best friends. You have lot of friends and it means that you are so friendly. Please don't forget my corrections and try to study it. Thank You! T.Bernard