in/at/on和corner搭配的区别

都是在拐角处的意思，但用法却不一样：
in the corner:在里面的拐角处，如：屋里面的拐角处有一台电冰箱。
There's a fridge in the corner of the room.

on the corner:在拐角之上,如:在书桌角上有一块橡皮。
There is an eraser on the corner of the desk.

at he corner:在拐角外面,如：在大楼拐角处有一个辆汽车。
There is a car at the corner of the building.
另外，在街道拐角处也用at the corner,如：街道拐角处有一家商店。

There is a shop at the corner of the street.