1
We all wanted to go to the Marta’s party.
We all wanted to go to Marta’s party.
Do not use the before a person’s name: ‘Marta’s party’, not ‘the Marta’s party’.
We can use the before a common noun: ‘the neighbour’s party’.
2
I had lunch with a friend of me.
I had lunch with a friend of mine.
I went to the party with a friend of Marta.
I went to the party with a friend of Marta’s.
After a/an/some + noun + of, use a possessive pronoun: ‘a friend of mine’, ‘a neighbour of hers’.
With a person’s name or another noun, use the possessive form: ‘a friend of Marta’s’ (= one of Marta’s friends), ‘some colleagues of Daniel’s’ (= some of Daniel’s colleagues).
3
The door’s handle was very dirty.
The door handle was very dirty.
The handle of the door was very dirty.
We normally use possessive ‘s with people and animals: ‘my father’s house’, ‘the dog’s tail’.
With things, we normally use two nouns together or a phrase with of: ‘the door handle’, ‘the handle of the door’.
We can also use ‘s with time expressions, places and organisations: ‘today’s news’, ‘Spain’s population’, ‘the company’s website’.