介词：
英语中最容易混淆的关系词

介词用于表示名词、代词与句中其他成分的关系。介词后通常接名词、代词或动名词。

in the room
on the table
at school
after dinner
because of the rain

12.1 时间介词 in, on, at

at 用于具体时刻：

at 7:00
at noon
at night
at midnight

on 用于具体某一天或某天的上午、下午、晚上：

on Monday
on May 1st
on a cold morning
on the evening of Friday

in 用于较长时间段：

in 2026
in May
in spring
in the morning
in the 21st century

12.2 地点介词 in, on, at

at 强调点：

at the bus stop
at the door
at the station

on 强调表面：

on the wall
on the table
on the floor

in 强调内部空间：

in the box
in the room
in China

12.3 for, since, during

for 加一段时间：

for two hours
for ten years

since 加时间起点：

since 2010
since last week

during 表示在某段期间内：

during the meeting
during the summer holiday

12.4 by, with, through

by 常表示方式、手段或执行者：

by bus
by email
written by Shakespeare

with 表示使用具体工具或伴随：

write with a pen
go with friends

through 表示穿过、通过过程或渠道：

walk through the forest
learn through practice

12.5 介词后的动词要用 doing

I am interested in learning English.
我对学英语感兴趣。

Thank you for helping me.
谢谢你帮助我。

He left without saying goodbye.
他没说再见就离开了。

常见错误：

错误：I am good at play basketball.
正确：I am good at playing basketball.