These questions ask how you are viewing a place: as an area that contains something, a surface that supports it, or a point where something happens. The noun category often settles the choice before the rest of the sentence does.
Choose the spatial view
Use in when the surroundings contain the person or thing: the tools are in a cupboard, and the family lives in Lisbon. Use on for contact with a surface: a cup rests on a shelf. A numbered building level also takes on, as in on the second floor. Use at when the place works as a point on a route or map: meet at the entrance. This is a grammatical view of the place, not a claim about its physical size.
| Place signal | Choice and example |
|---|---|
| Room, container, city, country or continent | Use in: in the studio, in Peru. |
| Surface or numbered building level | Use on: on the counter, on the fifth floor. |
| Clearly non-state island | Use on: on a small lake island. |
| Bus, train, plane or ferry where passengers can move around | Use on: on the ferry. |
| Car or taxi occupied by a passenger | Use in: in a taxi. |
| Spot, full address with a house number, or attended event | Use at: at the gate, at 8 Pine Road, at a lecture. |
| Top, bottom or end used as a reference point | Use at: at the bottom of the form. |
| Person or thing represented by an image or mirror | Use in: a mountain in the picture. |
Common traps
| Tempting route | How to reject it |
|---|---|
| Treating every physical object as either a container or a surface | Read the relation. Something enclosed is in; something touching the outside surface is on; a person merely located beside the object may be at it. |
| Calling a building level an enclosure | English treats a numbered floor as a level, so use on rather than importing the room pattern. |
| Using one transport pattern for every vehicle | Use on for larger public transport that permits movement around, but in for a car or taxi. |
| Using in with a complete numbered address | A house number makes the address a precise point. Choose at; do not apply the broad geographic-area pattern. |
| Using in for a guest attending an event | Attendance takes at. In can suggest participation inside a performance, which is a different meaning. |
Try it
The research team has a tent on a tiny uninhabited island that is not a country. Choose the standard sentence.
- They are camping at a tiny island.
- They are camping on a tiny island.
- They are camping in a tiny island.
- They are camping beside a tiny island.
Select all that apply: which sentences correctly treat a named spot as a location point?
- A guide is waiting in the bus stop.
- A guide is waiting at the bus stop.
- A courier is standing on the door.
- A courier is standing at the door.
The people are visible as part of the image, not standing on the paper. Complete using exactly in, the and photograph: There are six people ___