얘기한

In a sentence

• 전에 얘기한 이야기를 다시 생각해 봅시다.

  Let's think again about the story we discussed before.

  In this sentence, '얘기한' is used as a past tense participle modifying '이야기,' indicating the story that was discussed.

• 그 친구가 얘기한 문제가 정말 복잡하더라.

  The problem that friend mentioned is indeed complex.

  Here, '얘기한' functions as a past tense participle describing '문제' (problem), indicating the problem that was mentioned by the friend.

• 내가 얘기한 것은 걱정하지 않아도 돼.

  You don't need to worry about what I said.

  In this sentence, '얘기한' is linked to '것' (thing), referring to the topic or matter that was discussed by the speaker.