Prepositions
In, On, At … Three Little Words…
Three Big Headaches
In, on, at + location
In (inside)
On (on the surface, touching)
At (physically present, but not necessarily inside)
General rules
for In, On, At + location
In +
A room
A city
A state
A country
A continent
On +

Floor

Street
At +
Buildings
Events
Address
Familiar places (home, school, work)
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`
Prepositions of Position
at the back of
at the bottom of
at the top of
behind
between
in the corner of
in the middle of
next to
to the left of
on the other side of
to the right of
on the side of
on top of
opposite
Prepositions of Direction
Here are a number of preposition that can be used to show direction and movement
across
between
into
out of
past
round
through
towards
What is correct? In, on, or at?
________ room 104
________ the first floor
________ MiraCosta College
________ Mission Avenue
________ 1831 Mission Avenue
________ Oceanside
________ California
________ the United States
________ North America
________ planet Earth
________ the world
________ work
________ church
________ school
________ home