in on at 怎么区分用法啊越简洁越好
1个回答

in 表示在某个时空范围内,如 in the classroom,in 2011,in Beijing.

on 表示在某个表面之上,如 on the table,on the paper.

at 表示在某个时空点上,如 at the bus stop,at 7:00 pm.

以上是基本用法,还有一些抽象、虚拟和引申的用法:如 in my dream,in my life,on the economic issue,at academic level,at your point of view