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I live in an apartment at a beachfront.
I live in an apartment on a beachfront.
I live at an apartment located on a beachfront.

I think there many ways to describe what I tried to say, but I really want to know what is the most normal sentence to say that?

Thank you.
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The last two are all right. Perhaps more common is beachfront apartment.
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Nor Priestmost normal sentence to say that
Among your choices, in my judgment it is

I live in an apartment on a beachfront.

(at an apartment will not do!)

CJ
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Comments  
CalifJim(at an apartment will not do!)
I must be going blind.
Students: We have free audio pronunciation exercises.
Aspara GusI must be going blind.
Naaa. Just tired of reading these posts! I can sympathize.

CJ