1 This book is one of my friends'.

2 This book is a book of my friends'.

3 This book is one of my friends' books.

Do you agree that the first one is grammatically wrong? If yes, what is the reason for that?

  • Remember that apostrophes cannot be heard and are sometimes not seen. Use (3) if that is what you mean to say.
    – Peter
    Feb 12 at 11:31
  • 2
    4 This book belongs to one of my friends. Better still. Feb 12 at 11:36
  • Does the book belong to a single friend or is it one of the books belonging to multiple friends?
    – Stuart F
    Feb 12 at 11:48
  • 1
    What's wrong with One of my friends' books Why do you need to repeat "book" twice in sentences 2 and 3? It just makes the sentence sound clumsy.
    – Mari-Lou A
    Feb 12 at 12:16
  • I guess the repetition of "book" is to avoid ambiguity. But it would help to know exactly what is intended. The question of how to construct the possessive of "one of my friends" isn't obvious, if that's what's being asked, but I'm not sure if it is.
    – Stuart F
    Feb 12 at 16:41


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