Do you say 'in the street' or 'on the street'?

In American English, 'on the street' is standard ('She lives on Oak Street'). In British English, 'in the street' is also common for being physically inside the street area. For addresses, 'on' is the more universal choice.

Is it 'at school' or 'in school'?

'At school' means physically at the school building: 'She is at school right now.' 'In school' means enrolled as a student: 'He is still in school' (not yet graduated). Both are correct but have different meanings.

When do you use 'in' vs 'at' for cities?

Use 'in' for cities and countries when talking about being inside the area: 'I live in London.' Use 'at' for a specific location within a city: 'I'll meet you at Trafalgar Square.'

In vs. On vs. At for Place: When to Use Each

Quick Answer

In = inside an enclosed area, city, or country: "in the room," "in London," "in France"
On = on a surface, floor, or line (street): "on the table," "on the 2nd floor," "on Oxford Street"
At = at a specific point or address: "at the door," "at 10 Downing Street," "at the airport"

Explanation

IN (enclosed / area)

Use for spaces you can be inside of:

in the room / house / car
in the park / garden
in London / Paris
in England / France
in the world
in a photo / picture
in the newspaper
in bed

ON (surface / line)

Use for surfaces and lines (streets, floors):

on the table / floor / wall
on the 3rd floor
on Oxford Street
on the left / right
on the way
on TV / the radio
on the phone
on a farm / island

AT (specific point)

Use for specific points, addresses, and institutions:

at the door / gate
at 15 Oak Street
at the airport / station
at school / work / home
at the top / bottom
at the bus stop
at the corner
at the table (sitting)

Think of It as a Scale

The three prepositions follow a scale from large/general to small/specific:

"She lives in London, on Baker Street, at number 221."

IN = country/city level. ON = street level. AT = building/number level.

Common Pairs and Tricky Cases

at school vs. in school

at school = physically at the school building

in school = enrolled as a student (still studying)

in the corner vs. at the corner

in the corner = inside a room (The lamp is in the corner.)

at the corner = the corner of a street (Turn left at the corner.)

in bed vs. on the bed

in bed = sleeping or resting (I was in bed by 10.)

on the bed = on top of the bed surface (She put the clothes on the bed.)

Examples

✔The keys are in the drawer.

✔There is a picture on the wall.

✔I'll meet you at the entrance.

✘She works at London. (city = use "in")

✔She works in London.

✘The book is at the table.

✔The book is on the table.

Practice

Choose the correct preposition:

"I saw him standing _____ the corner of the street, waiting for a taxi." (in / on / at)