一. 分类：
1. 时间介词：in/on/at/after/before/for/since…
(1)in+超过一天的时间词（month/season/year/century等）；
e.g. in 2008 在2008年
in spring/summer/autumn/winter在春季/秋季/秋季/冬季
in April/October 在四月/十月
in the 21st century在二十一世纪
(2) on +具体到某一天的时间词（day/date等）;
e.g.on Monday/Sunday在星期一/在星期天
on the National Day在国庆节
on Sunday morning/afternoon/evening在星期天早上/下午/晚上
on September 1st在九月一号
(3)at+表几点几分的时间词（hour/minute等）；
e.g. at six thirty在6：30
at seven 在7：00
(4)特殊用法(固定搭配)：
e.g. in the morning/afternoon/evening在早上/下午/晚上
at night/noon/dawn/dusk在晚上/正午/黎明/黄昏
(5)after在……之后
e.g. I didn’t see home after that day.
(6) before在……之前
e.g. Tom had lived here before 1998.
(7) in +时间段 在……之后；在……之内
e.g. Mary will go to the USA in three days.
(8) for +时间段多长时间
e.g. I have studied English for eight years.
(9) since+过去的年份，自从……
e.g. Tom has lived there since 1996.
2. 地点介词：in, at, on等
(1) in +表示大地点的地点名词（国家/城市等）；
e.g. in Beijing 在北京
in New York在纽约
in China在中国
(2) at +表示小地点的地点名词（机场/家等）；
e.g. at home在家里
at airport在机场
(3) 特殊的地点介词用法：
e.g. on the farm在农场
3. 方位介词:在一个地点的某个方位。
(1) in 在……里面；
e.g.in the desk在桌子里面
(2) on 在……上面；
e.g.on the table在桌子上面
(3) under 在……下面；
e.g. under the desk在课桌下面
(4) behind在……后面；
e.g. behind the door在们后面
(5) in front of 在……的前面（外部）；
in the front of在……的前面（外部）；
e.g. The blackboard is in the front of the classroom.
The store is in front of the classroom.
(6) near在……的附近；
e.g. The supermarket is near the library.
(7) next to在……的旁边；
e.g. The book is next to my blue pen.
(8) across from在……的对面；
e.g. The bookstore is across from the street.
(9) between…and…在……和……之间。
e.g.The restaurant is between the supermarket and the bookstore.
4.方式介词：
(1)by通过某种方式
①by +doing sth. 用于回答how引导的疑问句。
e.g. I learn English well by reading every morning.
②by+交通工具，“乘/坐……”by bus乘公共汽车
③by+地点，“在……的旁边；靠近……”by the lake在湖边
④by+时间，“截止到……; 不迟于……” by ten十点前
⑤沿着，经由 to enter by the door 由门进去
⑥常用的短语：
by the way 顺便问一下
by accident= by chance偶然地
by mistake 错误地
one by one一个接一个
step by step 一步一步地
little by little逐渐地
by the time 到……为止
by oneself独自地
shake sb. by the hand 和某人握手
(2)with 的用法：表示用某种工具
①with +工具 ；
e.g. We like to write with a pen.
②with+人体部位 ；
e.g. We see with our eyes.
(3)in 的用法：通常与“衣着、声音、书写材料”等名称连用。
e.g. in+语言
in English用英语
in ink用墨水
speak in a loud voice大声地讲
in red穿红色的衣服
5.其它常见介词：
(1)through, over和across表通过时辨析；
①through从内部通过；
e.g. Tom entered the room through the window.
The train runs through the mountain.
②over从空中越过;
e.g. I threw the basketball over the river.
③across从表面通过；
e.g. We go to school across the street every day.
(2)besides, except和apart from的辨析， 意为“除此之外”；
①besides除此之外还有；
e.g. I also read that book besides this book.
②except除此之外没有；
e.g. All students went camping except Tom.
③apart from既可以和besides互换，也可以和except互换。
(3)among 和between…and…意为“在……之间”时的辨析；
①among指三者或三者以上之间；
e.g. Tom is the cleverest one among all students in my class.
②between…and…指两者之间。
e.g. There is a village between the hill and the river.