PREPOSITIONS OF TIME

AT   ON
We use at with times   We use on with dates and days
at 5 o’clock - at 11.45 - at midnight - at lunchtime   on 12 March - on Friday(s) - on Friday morning(s)
Tom usually gets up at 7 o’clock.   on Sunday afternoon(s) - on Saturday night(s)
on Christmas Day (but at Christmas)
We use at in these expressions    
at night - at Christmas - at the moment / at present - at the same time - at weekends - at the age of...    
     
IN   DURING
We use in for longer periods of time   We use during + noun to say when something happens
in April - in 1986 - in winter - in the 19th century - in the 1970s - in the morning(s) / in the afternoon(s) / in the evening(s)   during the film - during our holiday - during the night
We met a lot of interesting people during our holiday.
I fell asleep during the film.
In + period of time = a time in the future:    
Jack will be back in a week.
The train will leave in a few minutes.
   
     
In + how long it takes to do something    
I learned to drive in four weeks.    
     
FOR   SINCE
We use for + a period of time expressing duration   We use since + a starting point, a specific time
for six years - for two hours - for a week   since April - since 1992 - since 8 o’ clock
I’ve lived in this house for six years. They have been watching TV for two hours.   It has been raining since one o’ clock. They’ve known each other since they were at school.
     
UNTIL   FROM - TO
We use until/till to say how long a situation continues   We use from - to + beginning and end of a period
Let’s wait until it stops raining. I stayed in bed until half past nine.   Last evening we watched TV from 5 to 8 o’ clock.

 

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