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How to use "in", "on" and "at"?
The prepositions 'in', 'on' and 'at' can be useful when we're talking about time and location.
Prepositions of time
We use ‘at’ when we’re talking about a very specific period of time.
"I'm going to the park at 2pm."
We use ‘on’ when we’re talking about days as it is a bit more general.
"I'm going to work on Monday."
We use ‘in’ to talk about years, months or decades.
"I'm visiting Europe in 2016."
Prepositions of location
We use 'at' when we’re talking about a specific place or location.
"I’m on Selwyn Street."
We use 'on' when we're talking about streets or roads.
"I am at the park."
We use ‘in’ to talk about something very general like a city country or continent.
"I'm in Australia now."