高中英语语法系统讲解之三
介词和连词
介词
一. 介词的语法作用
用来表明名词、代词与句中其他词的关系的词叫介词。介词是虚词，不能重读，不能单独作句子成分，需要和它后面的词共同充当句子成分。介词及其宾语在句中作定语、状语、表语及宾语补足语等成分。如The key to the door is missing.(定语) Marx stayed in Belgium for some time and then went to France.(状语) Japan is to the east of China.(表语)
Make yourself at home.(宾语补足语)
二. 介词的分类
1. 根据介词的构成形式可将介词分为以下几类：
简单介词：at, by, for, in, on, from, during, past等
复合代词：out of, onto, into, insede, without等
短语介词：because of, instead of, in front of, by the end of等
双重介词：from behind, from around, till after等
动词的-ing形式介词：including, considering, regarding, concerning等
2. 根据介词的意义可将介词为以下几类：
1表示方位和空间关系的介词：at, round, in, over, below, in front of, outside, among, away from, arou
