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Preposition usage
A preposition is used to link nouns, pronouns and phrases to other words in a sentence. A preposition is used to indicate time (at $$12$$), place (at hospital), direction (to the hospital), or logical relationship between the other parts of the sentence. A preposition is followed by a noun.
The table below gives information on the most frequently used prepositions:

 Prepositions of  Time
 preposition usage example on days of the week on Sunday in monthsseasonsparts of the dayyearsafter a certain period of time in Januaryin winterin the morningin $$2016$$in an hour at a certain point of timeduring the time when it is darkduring the weekend at $$12$$ (o'clock)at nightat weekend topast telling the time $$10$$ to $$12$$ ($$11:50$$)$$10$$ past $$12$$ ($$12:10$$) till/until before a particular time, up to till/until Friday

Ուշադրություն
Until is a preposition. Until is often shortened to till or til.
Till or til are more informal and we don’t usually use them in formal writing.
 Prepositions of  Place
 preposition usage example on touching a surface or an object on the wallon the tableon the first floor in inside(room, building, street, city, country, book, car, taxi, picture, world, etc.) in the kitchen, in the house, in the street,in London, in the book, in the car, in a taxi,in the picture, in the world at an ​exact ​position or a ​particular ​place at the door, at the station, at the table,at a concert, at the party, at the cinema, at school, at work

 Other Prepositions
 preposition usage example about who or what you are discussing, describing, etc. We were talking about you. after when an event or action has ended Let's go for a ​walk fter breakfast. with ​when people or things are in a ​place together or are doing something together He ​lives with his ​grandmother.Join the two ​pieces together with ​glue. behind at the back of someone or something The teacher was standing behind me.

Ուշադրություն
on Christmas Eve
on New Year's Eve
at Easter
at Christmas