EnglishClub ESL Forums

I've heard the following sentences in film:


"He's a friend of dad's."


He's a friend of Charlie's."


are the sentences above grammatically correct?



In case they are correct, what is the difference from saying:


"He's a friend of dad."


He's a friend of Charlie."



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Thanks.

Yes, they are correct, while the non-possessive alternative versions are not.