In vs. At
'In' and 'at' are prepositions that are used for showing time. In this lesson, we will learn their uses and differences.
What is Their Main Difference?
The main difference between the prepositions 'in' and 'at' is in their degree of specificity.
Talking about Location
Both 'in' and 'at' can be used as prepositions of place. "In" emphasizes being inside or within a defined area (a room, city, country, container, etc.).
"At" refers to a point or location without focusing on being inside, and is often used for specific places or events (e.g., at the office, at the park, at the concert). For example:
She has been living
The keys are
He is currently
Here, the location of the subject is specified.
I am
In other words, "in" emphasizes being within boundaries, whether physical (inside a room or box) or abstract (inside a country or organization). For example:
The keys are
The book is
Talking about Time
'In' and 'at' can also be used as prepositions of time to talk about dates and time. We use 'in' to talk about non-specific times such as 'morning,' 'evening,' 'afternoon'. 'At', on the other hand, is used to indicate a specific moment in time such as 'noon', 'midnight,' or even a specific hour. Take a look at the following examples:
I always read
She was born
He will meet us
The event starts
Are They Interchangeable?
The answer is no. Replacing 'in' with at' or vice versa will change the meaning and even affect the grammaticality of the sentence as certain verbs are used with one and not the other. So you must pay attention to their differences and use each in the appropriate context.