John: Oh, OK. I know where that is. There's a new hotel on the corner.

印象中一般用at the corner（表示把拐角处看做一个点），用in the corner（在角落里面），on the corner到底表示什么含义呢？

先看看在网上搜索的英美人士的观点：

1.

"At" tends to refer to a location; "on" tends to refer to a position. If the position is in the location, we can use either. "At the corner" and "on the corner" are sometimes/often interchangeable. We usually stand "on" the corner, not "at" the corner. But we meet "at the corner" (location) or "on the corner" (position).

2.

Being in a corner is more enclosed, like if you are in the corner of a room. Being on a corner is more exposed, like standing on the corner of one street and another.

3.

We say 'in the corner of a room', but 'at the corner (or 'on the corner') of a street'.

综合看来，on the corner和at the corner是常常可以互换的。个人觉得in/ at/ on the corner的区别其实可以从三个介词隐含的“空间维度”不同来辨清。

at： 无维（也有人认为是一维）

点的概念（没有长宽高的内涵）

at the corner of the street就是把corner of the street和周围的商店、十字路口等地点平等地看做空间里面看做分量相同的不同的点，忽略各点在大小和高低上的区别。

on： 二维

面的概念（如垂直面有上下左右两维，水平面上有前后左右两维）

on the corner of the street指“在有横向有纵向两维的街角的表面上”

in：三维

体的概念（长、宽、高三维）

in the corner of the room指“在具有长宽高空间的墙角区域之内”