ago/before 전에 ~ 과거에 했던 일에 대해 말하려면 a year before, I went to... ❌ a year ago, I went to... 👍 one hour before, I had to... ❌ one hour ago, I had to... 👍 six months before, I came back from... ❌ six months ago, I came back from... 👍 ~ before의 한 가지 중요한 사용할 경우는 perfect aspect으로 된 절에서 더 먼 과거에 했던 일에 대해 말하려고 하는 경우입니다 예를 들어: one year ago I went to America, and one year before that I had gone to Korea. I had just gotten home an hour before, when I accidently fell asleep. ~~~in/after~~~ https://hellotalk.com/m/MQOlVKyLzIMTZD==?id=EKNJRN==