三、其他易混介词的用法解析

1. 动作介词to与toward的用法解析
to表示向某处移动，如：They were driving to work together.
toward 表示移向某处，如：We're moving toward the light.
2. 介词because、as、for的用法解析
because表示“因为；由于”指直接的、明确的原因，用来回答why的问句，语气最强。
如：The boy was absent because he was ill.
as表示“由于；鉴于”指一种显而易见、谈话双方已知的理由。
如：She stayed at home as she had no car.
for表示 “因为；由于”指一种间接原因，甚至只是一种附带的说明。
如：It must have rained last night, for the road is wet.
3. 材料介词of和from的用法解析
of用于成品与材料的性质不变时，如：The desk is made of wood.
from用于成品与材料的性质已变时，如：Wine is made from grapes.
4. 表示“用”的介词in、with、by的用法解析
in表示“用材料、语言”如：Can you say it in English?
with表示“用工具、某物”如：with a pen
by表示“用、以、靠、通过…方法”如：He prefers traveling by car.
5. between与among的用法解析
between 表示“在两者之间”如：Don’t sit between the two girls.
among表示“在…当中（三者或以上）”如：They lived among the mountains in the past.
6. besides与except的用法解析
besides表示“除…之外（全部计算在内）”如：We have seen the crocodile besides Li Fang.
except表示“除…之外（不计算在内）”如：We are all Chinese except Tom in our class.