Usage of "on" and "at"

[jerry]

Hi all

Which will fit best for the following sentence. I woulld like to have guidance on the usage of "on" and "at". Kindly give explanation on the same.

It is bad to step ____ the cracks in the sidewalk

a) on b) at c) with

[MikeNewYork]

Originally Posted by jerry

Hi all

Which will fit best for the following sentence. I woulld like to have guidance on the usage of "on" and "at". Kindly give explanation on the same.

It is bad to step ____ the cracks in the sidewalk

a) on b) at c) with

on

"On" usually refers to something with a horizontal surface for standing.

'At" usually refers to a general location.

They merge with something like the corner of a street. One can be at a corner or on a corner.

[jerry]

Thanks Mike .
That explains me fine.

[MikeNewYork]

Originally Posted by jerry

Thanks Mike .
That explains me fine.

You're welcome, Jerry.

[tinholiver]

Thanks Mike
There is diffcult to disinguish between "at" and "in". Could you explain that? Thanks.
Example: at home, at office
in office, in school