possessive with determiners (a friend of mine, etc)
possessive with determiners (a friend of mine, etc)
We cannot put a possessive together with another determiner before a noun. We can say my friend, Ann's friend, a friend or that friend, but not a my friend or that Ann's friend.
[determiner + noun + of + possessive] That policeman is a friend of mine. Here's that friend of yours I met another boyfriend of Lucy's yesterday. He's a cousin of the Queen's Have you heard this new idea of the boss's?