pluto was once regarded as the farthest planet from the sun = They once regarded Pluto as the farthest planet from the sun was regarded (be p.p) 면 They 가 앞에 왔다 해도 동사인 was가 있어야 하는거 아닌가요 was가 왜 없어진더죠 ?! ㅠㅜ