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Prepositions

Prepositions of time and date:

AT,ON,IN

at  a time	on a day	in a period
-I wake up at 6 o'clock -we take our lunch at midday -Angela and Gunay always visit their family at Christmas.	-we will go on Saturday. -the results of the bac exam will appear on 5th July. -my friend was born on Christmas day. -She received this news on the evening of 7th June.	-we always clean the house in the morning. -it rains here in the morning. - I was born in 1983.

AT,BY,TILL/UNTIL

• we use 'at'to say :at that time exactly.

EX:the movie will start at 9.00.

     dinner will be served at 8.00.

• we use 'by' when we mean to say either at  that time or at some time before it but not late or after this time.

EX:we have to be ready by 6 o'clock.

• till/until  means from a certain time to specific point of time.

EX:I will be at work till/until 11.00 .

     I will be swimming till/until 7.00.

ON TIME/IN TIME

-on time  means at the right time.

Ex: the bus left on time.

-in time means not late.

EX:we will be in time for the show.