Preposition In, On, AT

In general, we use:

• at for a POINT
• in for an ENCLOSED SPACE
• on for a SURFACE

at	in	on
POINT	ENCLOSED SPACE	SURFACE
at the corner	in the garden	on the wall
at the bus stop	in London	on the ceiling
at the door	in France	on the floor
at the top of the page	in a box	on the cover
at the end of the road	in my pocket	on the floor
at the entrance	in my bag	on the carpet
at the crossroads	in a building	on the menu
at the front desk	in a car	on a page

Look at these examples:

• Yunho is waiting for you at the bus stop.
• The shop is at the end of the street.
• My plane stopped at Paris and Korea and arrived in Hongkong two hours late.
• When will you arrive at the office?
• Do you work in an office?
• I have a meeting in New York.
• Do you live in Bangkok?
• Mars is in the Solar System.
• The author's name is on the cover of the book.
• There are no prices on this menu.
• You are standing on my foot.
• There was a "no smoking" sign on the wall.
• I live on the 7th floor at 21 Oxford Street in USA.

Notice the use of the prepositions of place at, in and on in these standard expressions:

at	in	on
at home	in a car	on a bus
at work	in a taxi	on a train
at school	in a helicopter	on a car
at university	in a boat	on a ship
at college	in a lift	on a bicycle, on a motorbike
at the top	in the newspaper	on a horse, on an elephant
at the bottom	in the sky	on the radio, on television
at the side	in a row	on the left, on the right
at reception	in Oxford Street	on the way