들였을

In a sentence

• 그는 방을 새롭게 꾸미는 데 많은 시간을 들였을 것입니다.

  He must have spent a lot of time redecorating the room.

  In this sentence, '들였을' comes from the verb '들이다', meaning 'to spend' or 'to put into effort'. It is used to describe the effort spent in the activity.

• 나는 그 프로젝트에 모든 열정을 들였을 때 큰 만족감을 느꼈다.

  I felt great satisfaction when I put all my passion into the project.

  Here, '들였을' again derives from '들이다', signifying dedicating or putting effort passionately into something.

• 우리는 모든 창의성을 들였을 아이디어를 발표했다.

  We presented the ideas into which we poured all our creativity.

  The word '들였을' is used in the context of applying creativity thoroughly to create ideas.