(1)简单介词
包括in,on,with,by,for,at,about等.
(2)合成介词
包括into,within,throughout,inside,outside等
(3)重叠介词
包括from among从...当中,from behind从...后面,until after直至...之后,at about在大约...,after about在大约...之后等
(4)短语介词
一个或两个简单介词和一个或几个其他词类构成一个短语,作用相当于一个介词,这就叫做介词短语.这类介词的末尾总是一个简单介词,如according to,because of,by means of,in addition to,in front of, in spite of,into等.
(5)分词介词
有极少数介词的词尾是“-ing”,形似现在分词(其中也有些可做分词).常用的有:considering,regarding,respecting,including.