former 和 previous 的区别

previous和former有哪些区别? former和previous officer和official previous和beforehand还有in advance的区别及用法? previous的短语和用法 prior,previous,original,primary 用法的区别 original 和 previous 的区别是什么,要形象点的解释 the latter 和the former 的关系 previously和previous的几点问题 former experience previous experience?答案是第二个 为什么不用former previous 的意思 英语（词义辨析）Mrs Lee was a previous/former student in his school. previous和previously怎么区别 他们都可以当副词啊