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In, on, and at are the three place prepositions that get confused the most in English, each with its own rule.
Written by Bryan López, Profesor de inglés · Updated
Prepositions of place say where something is. The three that get confused the most are in (inside a space), on (on top of a surface), and at (a specific point). Each has a clear rule, even when it doesn't match how it's said in other languages.
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The preposition "at" doesn't have one fixed translation in many languages, so it's common to use "in" for everything. "At the bus stop" is correct, not "in the bus stop," because a bus stop is a specific point, not an enclosed space. The same goes for "at work," "at school" when talking about the place in general, not the physical building.
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In is used for enclosed spaces (in the room), on for surfaces (on the table), at for specific points (at the door).
For places that surround something on all sides: in the box, in the city, in the car.
For something that's on top of a surface: on the table, on the wall, on the floor.
For a specific point or a meeting place: at the door, at the bus stop, at the party.
"The keys are in the drawer." "The picture is on the wall." "She is waiting at the corner."
Because "at" doesn't have one fixed translation in many languages, so it's common to use "in" for everything out of habit, even when the place is a specific point rather than an enclosed space.
Interactive exercises, real pronunciation, and the full lesson taught in English.