精选优质文档-倾情为你奉上介词一概念：介词用来表明名词与句中其他词的关系，介词是虚词，不能独立充当句子成分介词短语能够充当句子成分, 介词短语 = 介词+介词宾语（名词、宾格代词、动名词等充当）介词的作用介词表地点、位置、方向的介词above, around, at, behind, between, by, down, from, in, up, in front of, into, onto, near, off, out, over, through, under, towards, 表时间的介词by, in, on ,over, with其他介词like, with, without, from, next, to二、常用1、in 在.之内1) 表示地点，表示大地点。 Shes in China with her mom and dad. 2)表示时间，表示在某一个时间段内The weather is cold in winter. 3) 表
