We use phrases with prepositions as time adverbials:
- We use at with:
|at seven o'clock
|at nine thirty
|at fifteen hundred hours
|at the weekend
- We use in with:
|seasons of the year:
|in (the) spring/summer/autumn/winter
|years, centuries, decades:
|in the 20th century
|in the 60s
|in the 1980s
|in January/February/March etc.
|parts of the day:
|in the morning
|in the afternoon
|in the evening
- We use on with:
|on Monday/Tuesday/Wednesday etc.
|on Christmas day
|on my birthday
|on the thirty-first of July
|on June the fifteenth
We say at night when we are talking about all of the night:
but we say in the night when we are talking about a specific time during the night:
We often use a noun phrase as a time adverbial:
|the day before yesterday
|the day after tomorrow
|the other day/week/month
We can put time phrases together:
We will meet next week at six o'clock on Monday.
I heard a funny noise at about eleven o'clock last night.
It happened last week at seven o'clock on Monday night.
We use ago with the past simple to say how long before the time of speaking something happened:
I saw Jim about three weeks ago.
We arrived a few minutes ago.
We use in with a future form to say how long after the time of speaking something will happen:
I'll see you in a month.
Our train's leaving in five minutes.
- When (time and dates)