Ensayo

Prepositions of Place: at, in, on
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 thewall
at the bus stop in London on the ceiling
at the door in France on the door
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 mywallet 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:
• Jane is waiting for you at the bus stop.
• The shop is at theend of the street.
• My plane stopped at Dubai and Hanoi and arrived in Bangkok 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 Japan?
• Jupiter 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 London.

Notice the use of the prepositions of place at, in and on in these standard expressions:
at in on
at homein a car on a bus
at work in a taxi on a train
at school in a helicopter on a plane
at university in a boat on a ship
at college in a lift (elevator) on a bicycle, on a motorbike
at the top inthe 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

Prepositionsof Time: at, in, on
We use:
• at for a PRECISE TIME
• in for MONTHS, YEARS, CENTURIES and LONG PERIODS
• on for DAYS and DATES
at in on
PRECISE TIME MONTHS, YEARS, CENTURIES and LONG PERIODSDAYS and DATES
at 3 o'clock in May on Sunday
at 10.30am in summer on Tuesdays
at noon in the summer on 6 March
at dinnertime in 1990 on 25 Dec. 2010
at bedtime in the 1990s on Christmas Day
at...