Prepositions

Use: to indicate a specific or approximate time or location
Prepositions of Time Examples
at         

before 

after    

around

in     

on   

at		 I get up at 6:00.                    

I get up before 6:00.            

I go to bed after 6:00.          

I make dinner around 6:00.

I study in the morning/evening/afternoon.

I work on Saturday/the weekend.  

I work at night.

Prepositions of Place Examples

on  (surface)

at  (specific point)

in   (surrounded)
There are many homes on Castle Avenue.

I'm at 22 Castle Avenue.

I'm on the second floor.

You'll see me in the window.