마감했다

In a sentence

• 나는 저녁 준비를 마감했다.

  I finished preparing dinner.

  Here, '마감했다' is used to express completing the action of preparation, marking the ending of a process.

• 회사에서 프로젝트를 시간 안에 마감했다.

  In the company, the project was completed within the time limit.

  In this sentence, '마감했다' is used to denote the completion of a project by a deadline, highlighting the concept of termination within a timeframe.

• 그는 기한을 맞추지 못하고 서류 제출을 마감했다.

  He did not meet the deadline and closed the document submission.

  Here, '마감했다' implies terminating or closing an activity irrespective of achieving a successful endpoint.