preposition “AT, ON and IN”.

I know it is usually confusing which one to use in different scenarios.

Here are the best situations and general rules.

When talking about time, IN is used to refer to a general, long period

of time, such as months, years, decades, or centuries, for example “IN April,” “IN

2015”, “IN the 21st century.”

ON is used to talk about particular days, dates, and holidays, e.g., “I went to work

on Monday.”

AT is used to refer to hours, minutes or very specific times, .e.g., “The train will come

at 10:00 AM”, “He's still working at midnight.”

When talking about space and address, IN is used to refer to a large land-area like

City, States, Countries, etc., while ON is used to talk about street level locations

like road, avenue, etc., AT is used to refer to a specific or concrete address, like street

number.

For example, “Michael lives ON 12th street IN New York

City.”

“Her office is AT 250 Market Street in San Francisco.”

“Brazil is in South America.”

You can see, IN normally refers to a large space or long period, ON is relatively smaller,

shorter, but still not a concrete location or time, while AT is the smallest and shortest,

it often refers to a very specific location or time.

With this information, you can handle 95% of the use-cases, but you know, there're

always exceptions in English, like: when talking about surface, we always use

ON. while we use on when referring to days, but

IN is used for parts of days, like in the morning, in the afternoon, etc.

Hope now you can use AT ON and IN more confidently.

Thanks for watching.