말했던

In a sentence

• 제가 말했던 내용이 기억나세요?

  Do you remember what I said?

  Here, '말했던' refers to a past action of 'speaking', indicating something I said previously.

• 그가 말했던 계획은 정말 독창적이에요.

  The plan he talked about was really original.

  In this sentence, '말했던' is used to describe a plan that was discussed by him in the past.

• 우리가 말했던 날짜를 변경해야 합니다.

  We need to change the date we talked about.

  Here, '말했던' denotes the specific date that we mentioned during a prior conversation.