제출했다

In a sentence

• 그는 최종 보고서를 시간 내에 제출했다.

  He submitted the final report on time.

  In this sentence, '제출했다' is used to indicate the action of formally handing in a document or report.

• 나는 주어진 숙제를 오늘 아침에 제출했다.

  I submitted the assigned homework this morning.

  Here, '제출했다' is used to show the act of submitting completed work or assignment.

• 그 학생은 선생님께 과제를 제출했다.

  The student submitted the assignment to the teacher.

  In this instance, '제출했다' describes the act of delivering or submitting work to a recipient, in this case, the teacher.