Past perfect progressive
01
과거 완료 진행형, 과거 완료 진행 시제
a verb tense used to describe ongoing or continuous actions that started in the past and continued up until another point in the past, formed by using the past perfect tense of "to have" followed by "been" and the present participle of the main verb
문법 정보
유생성 상태
추상
형태적 구성
복합 합성어
가산
복수형
past perfect progressives



























