Should we use "In" or "At"

 Non-native speakers have a lot of confusions regarding the use of prepositions. Simply put, prepositions show the relationship between a noun with another noun or pronoun.

If you concentrate a little, you will learn to identify the difference between “In” or “AT”. In shows that you are inside something, you are within the limits of something. On the other hand, if you are not concerned with limits or being inside or you have to refer to a point then use at.

  Try to imbibe the following examples:

1. There is a hole in the door. (It means within the limits of the door there is a hole)
2.  I am at the door (Here, the door is being used as a point).
3. I am in the cinema (you are inside the building).
4. I am at the cinema (you can be anywhere, Inside or outside the building)
5. I am at the restaurant (you are telling everyone that you are at a point where food is served).
6. I am in the restaurant (you are inside it).

 At is also used to talk about activities taking place at some point:

• I am at the disco, pub, stadium.