相关单词同义词in advance, ago, formerly, ahead, back, 近义词 before 在 ... 以前, formerly 以前, already 已经, once 一次, beforehand 预先, earlier 早的, in the past 在过去（通常用于一般过去..., hitherto 到目前为止, heretofore 以前, antecedently 在前地临近词previous, previous step, previous mark, previous year, previous case, previous cell, Previous Menu, previous judg, previous data, previous icon, previous night相似词preventive, prevertebral, preview, previous, prey, prey on sb, prey on sb's mind idiom, prey on sth, 返回 previously