Diferença entre "dentist" e "dentist's".

Avatar do usuário Gustavo Sena 185 4
What is the difference between saying: "She's at the dentist" and "She's at the dentist's"?

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Avatar do usuário Thomas 14310 7 58 283
A good question, Gustavo, but the two expressions are used interchangeable. You will hear and read both. Keep up the good work.

Let me correct a couple small errors.
He is at a friend's = He is at a friend's house. (He is at friend's.)
He is at the dentist. = He is at the dentist's. = He is at the dentist's office. (At the of the dentist.)
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Avatar do usuário PPAULO 39765 6 32 695
Analogy:
He is at friend´s (meaning "he is at friend´s house)

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Apostrophes are used in this way to mean someone´s house or office, in "dentist´s" it means at dentist´s office.

Hence it can be:
"at the of the dentist" or "at the dentist´s office/at the dentist´s".