Adverbial Clause2nd状语从句经典(4)

时间状语从句(Adverbial Clauses of Time)常见的引导词when/while “当…时候” as “当…时”或“一边…, 一边…” since “自从…以来” before/after “在…之前/在…之后” until/till “直到…才”/ “直到…” as soon as, “一…就…”