1- Prepositions of Time: at, on, in

 

 

at	on	in
PRECISE TIME	DAYS and DATES	MONTHS, YEARS, CENTURIES and LONG PERIODS
at 3 o'clock	on Sunday	in May
at 10.30am	on Tuesdays	in summer
at noon	on 6 March	in the summer
at dinnertime	on 25 Dec. 2010	in 1990
at bedtime	on Christmas Day	in the 1990s
at sunrise	on Independence Day	in the next century
at sunset	on my birthday	in the Ice Age
at the moment	on New Year's Eve	in the past/future

at night	The stars shine at night.
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	He's not home at present. Try later.

 

 

When we say last, next, every, this we do not also 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)