만들었는데

In a sentence

• 제가 직접 이 케이크를 만들었는데 맛이 좋은 것 같아요.

  I personally made this cake, and I think it tastes good.

  In this sentence, '만들었는데' is used to describe the past action of making the cake, with '었는데' indicating a transition or background from that action to the speaker's opinion about the taste.

• 그들은 큰 문제를 만들었는데 해결하기가 정말 어려웠습니다.

  They created a big problem, and it was really difficult to solve.

  Here, '만들었는데' indicates that the problem was made in the past, leading into the statement about the difficulty of solving it, showing cause-effect or context-setting.

• 우리가 함께 프로젝트를 만들었는데 좋은 결과를 기대하고 있어요.

  We worked together to create a project, and we are expecting good results.

  In this case, '만들었는데' refers to the collaborative creation of a project, and transitions to the speaker's anticipation of favorable outcomes due to that creation.