Common mistakes: In vs. At

Confusing Prepositions

.Liam has a flat at Paris
.Liam has a flat in Paris

.My mother is staying in 66 Argyle Street
.My mother is staying at 66 Argyle Street

In

.Incorrect: Liam has a flat at Paris
.Correct: Liam has a flat in Paris

We use “in” to describe the physical location of something as part of a larger thing or place

At

.My mother is staying in 66 Argyle Street
.My mother is staying at 66 Argyle Street

We use “at” when we’re talking about an address, a public place or building (a bus stop, the Post Office, the library, etc.) and cases in which the location is irrelevant but what we do there is what matters (school, the dentist, dance class, etc)