previous与before的区别
问题描述：
previous与before的区别
答
previous 上一个
before 之前
before 大致等于 previously，但两个词用法不同。
答
before 作 介词,连词,或者副词.介词：可在后加一个时间点或者短语.如 before 6 o'clock.连词：连接句子.she had finished homework before we went shopping.副词：作为状语.I’ve never been there before.previous...