English Usage of In At On

A non-native English speaker feels that in practice preposition (in, at, on) is one of the most difficult one. I oftentimes confused how and when to use what. My immediate response to this confusion is: use any preposition whatever I like; which I think suitable for a particular word. This “insting response is certainly politically incorrect. Here’s a brief manual guide on the prep stuff.

Preposition Use – in / at / on – prepositions of place

IN

Use ‘in’ with spaces:

in a room / in a building
in a garden / in a park
Use ‘in’ with bodies of water:

in the water
in the sea
in a river
Use ‘in’ with lines:

in a row / in a line
in a queue

AT

Use ‘at’ with places:

at the bus-stop
at the door
at the cinema
at the end of the street

Use ‘at’ with places on a page:

at the top of the page
at the bottom of the page
Use ‘at’ in groups of people:

at the back of the class
at the front of the class ON

Use ‘on’ with surfaces:

on the ceiling / on the wall / on the floor
on the table
Use ‘on’ with small islands:

I stayed on Maui.
Use ‘on’ with directions:

on the left
on the right
straight on

IMPORTANT NOTES

In / at / on the corner

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

In / at / on the front

We say ‘in the front / in the back’ of a car
We say ‘at the front / at the back’ of buildings / groups of people
We say ‘on the front / on the back’ of a piece of paper
Test Your Understanding

Now that you have studied the use of on / at / in as a preposition of place, try the follow-up quiz to test your understanding.

Preposition Use – in / at / on – prepositions of time and date

IN

Use ‘in’ months and years and periods of time:

in January
in 1978
in the twenties

Use ‘in’ a period of time in the future:

in a few weeks
in a couple of days

AT

Use ‘at’ with precise time:

at six o’clock
at 10.30
at two p.m.

ON

Use ‘on’ with days of the week:

on Monday
on Fridays

Use ‘on’ with specific calendar days:

on Christmas day
on October 22nd

IMPORTANT NOTES

in the morning / afternoon / evening – at night

We say in the morning, afternoon or evening BUT we say ‘at night’