介词 ( preposition ) 一 介词的分类与语法功能1.介词是虚词, 不能单独做句子成分, 必须与名词、代词( 或相当于名词的其他词类、短语、或从句 ) 构成介词短语,在句子中充当一个成分。介词分为: 简单介词: at 、 in 、 on 、for 、 to 合成介词: within 、 inside 、 onto 、 throughout . 短语介词: according to 、 out of 、 because of 、 by means of 、 in spite of 、 instead of 双重介词 : from behind /above / under , until after 分词介词 :considering , including , judging from /by 1. It is going to rain this afternoon according to the weather forecast.2. He quarrelled with her yesterday.3. He succeeded in passing the fi