初中英语介词的用法一、介词按其构成可分为：1. 简单介词 at, in, on, to, since, until 等。如Hes worked there since 1998.2. 复合介词 into, onto, out of 等。如：She is out of school. 3. 二重介词 from under, from behind, from out of, until after, except in 等。如： Im from out of town. 4. 短语介词 because of, instead of, in spite of 等。如：I went back not because of the rain, but because I was tired.二、介词的作用：1. 表示地点：after, along, at, below, by, of, near, over, through, under 等。如：1) at (a)表示在小地方; (b)表示“在附近，旁边”in (a)表示
