部(へ)屋(や) heyaは waきれい kireiに ni整(せい)頓(とん) seitonされていた sareteita。 The room was neatly organized. Literal Room [topic-は] neatly tidied was. Uses the passive-resultative 整頓されていた — the room was in a state of having been organized. きれいに functions as an adverb meaning 'neatly, cleanly.' homechores~ている (resulting state)passive voice (~れる/~られる)
部(へ)屋(や) heyaは waきれい kireiに ni整(せい)頓(とん) seitonされていた sareteita。 The room was neatly organized. Literal Room [topic-は] neatly tidied was. Uses the passive-resultative 整頓されていた — the room was in a state of having been organized. きれいに functions as an adverb meaning 'neatly, cleanly.' homechores~ている (resulting state)passive voice (~れる/~られる)