The word "at" shows us WHERE something is. It doesn't tell us whether it is beside, inside, below or above. It simply shows WHERE.
We use "at" when talking about positions or locations.
He is at the restaurant.
![A man at the restaurant](http://www.really-learn-english.com/image-files/menu.png)
She's at the office.
![A woman at the office](http://www.really-learn-english.com/image-files/pending.png)
He's at home!
![Father came home](http://www.really-learn-english.com/image-files/greeting.png)
They met at a party.
![A party](http://www.really-learn-english.com/image-files/party-kids.png)
He is sitting at the corner.
![At the corner](http://www.really-learn-english.com/image-files/corner.png)
They are sitting at the table.
![A family](http://www.really-learn-english.com/image-files/at-the-table.png)
He was standing at the window.
![A broken window](http://www.really-learn-english.com/image-files/broken-window.png)
In
The clothes are in the closet.
![A closet](http://www.really-learn-english.com/image-files/closet3.png)
He's in the kitchen.
![A tired man](http://www.really-learn-english.com/image-files/kitchen.png)
They are talking in the street.
![In the street](http://www.really-learn-english.com/image-files/in-the-street.png)
She is lying in bed.
![A sick lady](http://www.really-learn-english.com/image-files/woman-sick-in-bed.png)
There was a fire in the fireplace
and she was sitting in the armchair.
![A blonde lady](http://www.really-learn-english.com/image-files/cozy.png)
There is a shark in the water!
![A shark!](http://www.really-learn-english.com/image-files/shark.png)
It was written in the newspaper.
![A happy man](http://www.really-learn-english.com/image-files/goodnews.png)
Chile is a country in South America.
![A map](http://www.really-learn-english.com/image-files/detail_vector_map_of_south_america.png)
![A closet](http://www.really-learn-english.com/image-files/closet3.png)
He's in the kitchen.
![A tired man](http://www.really-learn-english.com/image-files/kitchen.png)
They are talking in the street.
![In the street](http://www.really-learn-english.com/image-files/in-the-street.png)
She is lying in bed.
![A sick lady](http://www.really-learn-english.com/image-files/woman-sick-in-bed.png)
There was a fire in the fireplace
and she was sitting in the armchair.
![A blonde lady](http://www.really-learn-english.com/image-files/cozy.png)
There is a shark in the water!
![A shark!](http://www.really-learn-english.com/image-files/shark.png)
It was written in the newspaper.
![A happy man](http://www.really-learn-english.com/image-files/goodnews.png)
Chile is a country in South America.
![A map](http://www.really-learn-english.com/image-files/detail_vector_map_of_south_america.png)
On
We use "on" when one thing is ATTACHED to or TOUCHING another.There is a mirror on the wall.
![In the morning...](http://www.really-learn-english.com/image-files/morning2.png)
There is a stain on his shirt.
![Oops...](http://www.really-learn-english.com/image-files/stain.png)
The books are on the shelves.
![Many books](http://www.really-learn-english.com/image-files/books-on-shelves.png)
he puts plates on the table.
![A happy man](http://www.really-learn-english.com/image-files/plate-on-the-table.png)
There is one candle on the cake.
![A cake](http://www.really-learn-english.com/image-files/2010_birthday_cake_with_one_candle_lit.png)
He likes riding on his horse.
![A boy and his horse](http://www.really-learn-english.com/image-files/riding-on-horse.png)
![In the morning...](http://www.really-learn-english.com/image-files/morning2.png)
There is a stain on his shirt.
![Oops...](http://www.really-learn-english.com/image-files/stain.png)
The books are on the shelves.
![Many books](http://www.really-learn-english.com/image-files/books-on-shelves.png)
he puts plates on the table.
![A happy man](http://www.really-learn-english.com/image-files/plate-on-the-table.png)
There is one candle on the cake.
![A cake](http://www.really-learn-english.com/image-files/2010_birthday_cake_with_one_candle_lit.png)
He likes riding on his horse.
![A boy and his horse](http://www.really-learn-english.com/image-files/riding-on-horse.png)
Examples of Usage
At | In | On |
at home | in bed | on the table |
at work | in the box | on the shelf |
at school | in the closet | on the wall |
at the airport | in a basket | on the second floor |
at the office | in his pocket | on Columbus street |
at the party | in the car | on page 10 |
at the restaurant | in the kitchen | |
at the university | in the water | |
at the theater | in an armchair | |
at the hotel | in the street | |
at the wedding | in the garden | |
at the bus stop | in prison | |
at the corner | in Times Square | |
at 12 Colombus Street | in New York | |
at Bob's (= at his house) | in Texas | |
at the center | in the USA | |
at the top | in the sky | |
at the back of the house | in the mirror | |
at the door (= next to the door) | in a traffic jam | |
at the table (= next to the table) | in the book |