previous与before的区别
题目
previous与before的区别
答案
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...
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我想写一篇关于奥巴马的演讲的文章,写哪一篇好呢?为什么好
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