In, On, At
Master the core spatial logic — 'in' for enclosed spaces, 'on' for surfaces, 'at' for specific points — plus the fixed expressions that override the general rule.
-
My phone is ringing — it's ___ my bag, I can hear it.
Show answer
in
Use 'in' for enclosed spaces — the phone is inside the bag.
-
Your coffee is ___ the kitchen table.
Show answer
on
Use 'on' for surfaces — the coffee rests on the table.
-
I'll wait for you ___ the bus stop.
Show answer
at
Use 'at' for specific meeting points — a bus stop is a point.
-
Their office is ___ the third floor.
Show answer
on
Floors are surfaces in English — always 'on the … floor'.
-
She lives ___ Madrid now.
Show answer
in
Cities and countries take 'in' — in Madrid, in Spain.
-
We spent two hours ___ the train.
Show answer
on
Public transport uses 'on' — on the train, on the bus, on a plane. (Cars are the exception: 'in a car'.)
-
The whole building was ___ fire when we arrived.
Show answer
on
'On fire' is a fixed expression — it doesn't follow the spatial rule.
-
These shoes are ___ sale this week.
Show answer
on
'On sale' = available at a reduced price. Fixed expression with 'on'.
-
The villagers were ___ danger from the floods.
Show answer
in
'In danger' is a fixed expression — you are 'inside' a state of risk.
-
She's been ___ the phone for an hour.
Show answer
on
'On the phone' = engaged in a phone call. Fixed expression.
-
Your name isn't ___ the guest list.
Show answer
on
Lists are treated as surfaces — 'on the list', not 'in the list'.
-
The town is built ___ the coast.
Show answer
on
Use 'on' for coastlines, rivers and edges — a coast is a long edge.
In, On, At: Core Logic and Fixed Expressions
'In', 'on', and 'at' express three different spatial relationships. 'In' places something inside the boundaries of an enclosed space — a bag, a room, a city. 'On' places something on a surface it rests against or is attached to — a table, a floor, a coastline. 'At' identifies a specific point, usually a functional meeting place rather than a physical container or surface — a bus stop, a specific address. Public transport adds an exception that trips up many learners: buses, trains, and planes take 'on' even though you are physically enclosed inside them, while cars take 'in'. Beyond the general logic, a cluster of fixed expressions — 'on fire', 'on sale', 'in danger', 'on the phone' — assign a preposition by convention rather than by the spatial rule, and these must be memorised individually.
In — Enclosed Spaces
She lives in Madrid now. (cities and countries take 'in')
We spent two hours in the car. (cars are the exception among vehicles)
On — Surfaces, Floors, and Coastlines
Their office is on the third floor. (floors are surfaces in English)
We spent two hours on the train. (public transport takes 'on')
The town is built on the coast. (a coastline is a long edge)
At — Specific Points
Fixed Expressions That Break the Rule
These shoes are on sale this week. (not 'at sale')
The villagers were in danger from the floods. (not 'at danger')
She's been on the phone for an hour. (not 'in the phone')
Your name isn't on the guest list. (lists are treated as surfaces)
Common Mistakes
✗ Their office is in the third floor. → ✓ Their office is on the third floor.
✗ The whole building was in fire when we arrived. → ✓ The whole building was on fire.
✗ The villagers were at danger from the floods. → ✓ The villagers were in danger.
✗ Your name isn't in the guest list. → ✓ Your name isn't on the guest list.
Last updated: · Satori Editorial