爱学社学习交流中心 古之成大事者,不惟有超士之才,亦有坚韧不拔之志。 Every one can be successful,but there are so many different ways.Which one could make it come true,its up to yourself! Just try your best to do it! 第二次课一主要内容介词的分类,用法及区别二知识要点1. 介词的分类根据介词的构成形式分类A. 简单介词由一个词构成的介词称为简单介词at,in,on,or,near,after,with,beforeB. 合成介词由两个词合成的介词称为合成介词inside,outside,onto,into,nearby,withoutC. 双重介词由两个简单介词重叠在一起构成的介词称为双重介词fom behind,until after, from amongD. 短语