Explanations » A1 Grammar Explanations » At, in, on – prepositions of time

At, in, on – prepositions of time

at, in, on – prepositions of time

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➪ Use at with times of day, including mealtimes, bedtime, etc.

  • at 3 o’clock, at 10.30 am, at noon, at dinnertime, at bedtime, at sunrise, at sunset, at the moment

➪ Use in with months, seasons, years, decades, centuries and long periods of time in general.

  • in May, in the summer, in 1990, in the 1990s, in the 20th century, in the Ice Age, in the past/future

➪ Use on followed by days and dates.

  • on Sunday, on Tuesday mornings, on 6 March, on 25 December 2010, on Christmas Day, on Independence Day, on my birthday, on New Year’s Eve

➪ Use at in the following common expressions:

  • at the weekend: I don’t usually work at the weekend.
  • at Christmas/Easter: I stay with my family at Christmas.
  • at the same time: We finished the test at the same time.
  • at present/at the moment: He’s not home at present. Try later.

➪ Parts of the day:

  • in the morning
  • in the afternoon
  • in the evening
  • at night

Last, next, every and this

When we say last, next, every, this we do not use at, in, on.

  • I went to London last June. (NOT in last June)
  • He’s coming back next Tuesday. (NOT on next Tuesday)
  • I go home every Easter. (NOT at every Easter)
  • We’ll call you this evening. (NOT in this evening)