There are four kinds of determiner ending forms(관형사형어미) for a verb * present -는 저기 가는 자동차 * past (으)ㄴ 어제 먹은 빵 * incomplete past -던 어제 먹던 빵 * future -(으)ㄹ 내일 먹을 밥 내가 좋아한 사람 is past tense A person whom I liked 내가 좋아하는 사람 is present tense A person whom I like cf. There are three kinds of determiner ending forms for an adjective. * present -(으)ㄴ 예쁜 꽃 * past -던 예뻤던 꽃 * future -(으)ㄹ 예쁠 꽃

Thank u so much for helping ^^

g'day, I think 은/는 --> Present tense, ㄴ --> Past tense. 좋아하는 사람 --> A person who is liked 좋아한 사람 --> A person who was liked You can use this grammar point when you want a 'verb' to modify a 'noun' 좋아한 사람이 저의 친구이었어요 --> The person who was liked was my friend. I'm only a student, so I hope this helps you, and I apologise if I made a mistake.