In, on or at (place)
The short answer
In is for enclosed spaces: in the box, in Lisbon. On is for surfaces and lines: on the table, on the wall, on Oxford Street. At is for points and addresses: at the door, at the bus stop, at number twelve. The same narrowing pattern as with time.
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At a glance
In or On or At?
| Compare | InEnclosed spaces. The largest. | OnSurfaces and lines. | AtPoints and addresses. |
|---|---|---|---|
| Scale | Inside something | On top of, or along | A precise point |
| Examples | in the drawer, in France | on the shelf, on the coast | at the corner, at the till |
| Buildings | in the museum: inside it | Not used | at the museum: as a destination |
| Transport | in a car, in a taxi | on a bus, on a train, on a plane | Not used |
| Addresses | in Baker Street: UK | on Baker Street: US | at 221b Baker Street |
| Fixed phrases | in bed, in hospital, in prison | on holiday, on the phone | at home, at work, at school |
How to choose
Ask these, in order
- 1
Is it inside something with boundaries?
In. Rooms, containers, towns, countries.
The keys are in my other jacket.
Inside it.
- 2
Is it resting on a surface, or along a line?
On. Tables, walls, floors, streets, coasts, rivers.
There’s a note on the fridge.
On the surface.
- 3
Is it a point, an address, or a place you go to for a purpose?
At.
I’ll meet you at the entrance.
A point, not a space.
NBIn the entrance would mean standing inside the doorway itself.
- 4
Is it a building, do you mean the activity or the structure?
At for the activity, in for the physical inside.
She’s at the theatre. / It’s cold in the theatre.
Watching a play. / Inside the building.
Side by side
Each one, in full
In: enclosed spaces
Enclosed spaces. The largest.
In marks enclosure: anything with boundaries you can be inside. Containers and rooms take it, and so do towns, regions and countries, which English treats as spaces: in Manchester, in Andalusia, in Japan.
Small enclosed transport also takes in: in a car, in a taxi, in a lift. And a short list of fixed phrases uses it with no article: in bed, in hospital, in prison, where the article would change the meaning to the physical building.
The keys are in my other jacket.
Inside it.
He left his coat in the car.
In for a car, on the car would mean the roof.
She’s been in hospital since Tuesday.
As a patient, so no article.
On: surfaces and lines
Surfaces and lines.
On marks contact with a surface: on the table, on the wall, on the ceiling, on the floor, and position along a line: on the coast, on the river, on Oxford Street, on page forty.
Large transport takes on as well, because you can stand and move about: on a bus, on a train, on a plane, on a ship. Floors take on too: on the third floor, even though you are inside the building.
There’s a note on the fridge.
On the surface.
The hotel is on the seafront.
Along a line.
I was on the bus when you called.
Large transport.
At: points and addresses
Points and addresses.
At marks a point rather than a space: at the crossroads, at the bus stop, at the top of the page, at 24 Rue Lepic. It is also what you use for a building considered as a destination or an activity: at the dentist, at the cinema, at the bank.
The fixed phrases with no article belong here too: at home, at work, at school, at university. Adding the article shifts the meaning from the activity to the building: at school is attending, at the school is standing outside it.
I’ll meet you at the entrance.
A point, not a space.
She’s at work until six.
The activity, so no article.
I met him at the school gates.
The building, so the article returns.
Mistakes to avoid
What learners actually get wrong
I was in the bus when you called.
I was on the bus when you called.
Large transport takes on, bus, train, plane, ship, while small enclosed transport takes in: in a car, in a taxi. The usual explanation is whether you can stand up and walk about.
He’s in school at the moment, meaning he is a pupil.
He’s at school at the moment.
At school means attending; in the school means physically inside the building. The article is the signal, and the same split applies to at hospital and in the hospital.
We arrived to the airport at six.
We arrived at the airport at six.
Arrive takes at for a point and in for a town or country, arrive in Rome. It never takes to, which is a direct transfer from languages that use their equivalent of to with verbs of arriving.
The picture is in the wall.
The picture is on the wall.
A wall is a surface, so it takes on. In the wall would mean embedded inside the masonry, which is a real but rarely intended meaning.
Now use it
Prepositions in, on, at
Time and place: the pair of rules behind most preposition errors. Reading a rule and being able to apply it are different skills, and only one of them shows up when you speak.
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Questions
Asked and answered
- Is there a rule for buildings?
- Ask whether you mean the activity or the structure. At the cinema, at the bank, at the dentist all mean you are there for its purpose. In the cinema means physically inside the room, which is why it turns up in sentences about temperature, noise and space.
- Why in a car but on a bus?
- The standard explanation is that you can stand and move around on a bus, train or plane but not in a car or taxi. It is a rationalisation rather than the historical cause, but it predicts correctly, which is all a memory aid needs to do.
- In Baker Street or on Baker Street?
- In is British, on is American, and both are correct in their variety. With a house number, both varieties use at: at 221b Baker Street. That is the safe form if you are unsure which audience you are writing for.