ago (ad. 以前) before (a. 以前,在...以前 contextual (a. 文脉上的,以前后关系) fore (a. 在前的,以前的 former (a. 以前的,在前的 formerly (ad. 以前,从前) preliterate (a. 无文字记录的,文字以前的) previous (a. 在...之前,先,前,以前的) previously (ad. 以前(预先)) quondam (a. 过去的,以前的) sometime (a. 以前的,某一时间 used (a. 使用过的,二手的,习惯的