介词

介词
   　介词(preposition)：也叫前置词。在英语里，它的搭配能力最强。但不能单独做句子成分需和名词或代词（或相当于名词的其他词类、短语及从句）构成介词短语，才能在句中充当成分。 
介词的种类：
（1）简单介词：about, across, after, against, among, around, at, before, behind, below, beside, but, by, down, during, for, from, in, of, on, over, near, round, since, to, under, up, with等等。
（2）合成介词：inside, into, outside, throughout, upon, without, within
（3）短语介词：according to, along with, apart from, because of, in front of, in spite of, instead of, owing to, up to, with reguard to
（4）分词介词：considering, reguarding, including, concerning
介词短语：
 构成   例句    
 介词+名词     We go to school from Monday to Saturday.      
介词+代词     Could you look for it instead of me?    
 介词+动名词     He insisted on staying home.     
介词+连接代/副词     I was thinking of how we could get there.     
介词+不定式/从句     He gives us some advice on how to finish it.