Kamis, 17 Februari 2011

Pre - position in, on, and at

Preposition of Time : at, in, on

We use :
  • at for a PRECISE TIME
  • in for MONTHS, YEARS, CENTURIES and LONG PERIODS
  • on for DAYS and DATES
atinon
PRECISE TIMEMONTHS, YEARS, CENTURIES and LONG PERIODSDAYS and DATES
at 3 o'clockin Mayon Sunday
at 10.30amin summeron Tuesdays
at noonin the summeron 6 March
at dinnertimein 1990on 25 Dec. 2010
at bedtimein the 1990son Christmas Day
at sunrisein the next centuryon Independence Day
at sunsetin the Ice Ageon my birthday
at the momentin the past/futureon New Year's Eve

Look at these examples:
  • I have a meeting at 11am.
  • The shop closes at midnight.
  • Jane went home at lunchtime.
  • In London, it often snows in December.
  • Do you think we will go to Mars in the future?
  • There should be a lot of progress in the next century.
  • Do you work on Wednesday?
  • Her birthday is on 17 May.
  • Where will you be on New Year's Day?
Notice the use of the preposition of time at in the following standard expressions:
ExpressionExample
at nightThe Moon shine at night.
at the weekendI don't usually work at the weekend.
at Christmas/EasterI stay with my family at Christmas.
at the same timeWe finished the test at the same time.
at presentHe's not home at present. Try later.

Notice the use of the prepositions of time in and on in these common expressions:
inon
in the morningon Sunday morning
in the morningson Friday mornings
in the afternoon(s)on Saturday afternoons
in the evening(s)on Thursday evening

When we say last, next, every, this we do not also use at, in, on.
  • I went to London last May. (not in last May)
  • He's coming back next week. (not on next Week)
  • I go home every Easter. (not at every Easter)
  • We'll call you this Afternoon. (not in this Afternoon)

Preposition of Place : at, in, on

In general, we use :
  • at for a POINT
  • in for an ENCLOSED SPACE
  • on for a SURFACE
atinon
POINTENCLOSED SPACESURFACE
at the cornerin the parkon the wall
at the bus stopin Manchesteron the ceiling
at the doorin Germanyon the door
at the top of the pagein a basketon the cover
at the end of the roadin my pocketon the floor
at the entrancein my walleton the carpet
at the crossroadsin a buildingon the menu
at the front desk in a caron a page

Look at these examples:
  • Jane is waiting for you at the bus stop.
  • The shop is at the end 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:
atinon
at homein a caron a bus
at workin a taxion a train
at schoolin a helicopteron a plane
at universityin a caron a ship
at collegein a lift (elevator)on a bicycle, on a motorbike
at the topin the newspaperon a horse, on an elephant
at the bottomin the skyon the radio, on television
at the sidein a rowon the left, on the right
at receptionin Oxford Streeton the way 

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