精选优质文档-倾情为你奉上 介 词 1 表示时间的介词:at, in, on, before, to, from, by, till, until, after, for, since 等。2 表示地点,位置,方向的介词:next, to, in, in front of, on , out of, at, above, over, into, near, between, under, up, across, by, down, from, around, behind, beside等3 表示原因,理由的介词:for, as, at, from 等4 表示方式的介词:on, in, by, with 等。常用介词辨析1 表示时间的in, on, at, after1) in 的用法。用于早晨、下午、傍晚。In the morning/afternoon/evening用于月、年、季节等。In March, in 1986, in spring用于一段时间后。In a week, in a years tim