2012 고1 모의고사
ever since the letter came from his uncle, he was walking around with his head up on the big hungarian plain.

since가 이후로~란 뜻을 가질 때는, 주절이 완료형태라고 알고 있는데요
의미로도 had been walking ~이 더 어울리는 거 같은데....

여튼 꼭 완료형태가 안 와도 되는 건가요?