Prepositions 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

1) We use the preposition in for years, seasons, months and moments of the day.
in
the twentieth century
1987
the 1880s
spring/ summer
the morning/ the evening
October
2) We use the preposition on for completed dates, days of the week, holiday days.
on
21 April
Christmas Day
Sunday
Saturday night
3) We use the preposition at for a reference point in time.
at
six o'clock
weekends
night


EXERCISE:
1)Do you work ....... Mondays?
2)I have a meeting........9am.
3)They worked in a restaurant ...... 1998
4)We usually play tennis ..... Sunday.
5)There are some the book.....the chair
6)We went to a great party ......Janauary
7) I was born ..... 1968
8)My flight is ..... Monday
9)The English examination is ..... July.
10)Mary is going to the theatre ..... Friday.
BY:

COLELLA GIANLUIGI

GRILLO RAFFAELE