This is the 13855th most frequent Korean word.
만들던
"만들던" means "was making" or "used to make," referring to an ongoing action in the past.
In this sentence, '만들던' modifies '작은 배,' indicating the action of making that was ongoing in the past.
그가 만들던 작은 배는 정말 멋있었어요.
The small boat he was making was truly impressive.
Here, '만들던' describes '프로젝트,' specifying the action of creating that occurred in the past but has relevance to the current completion.
우리가 만들던 프로젝트가 마침내 완성되었습니다.
The project we were working on has finally been completed.
'만들던' in this instance qualifies '노래,' referring to the act of composing performed by '너희' in the past.