Possessive determiners and possessive ’s

1 We use possessive ’s to say that something or someone belongs to a person, place or thing. We often use possessive ’s with names.
1 This is Joy’s dog.
2 Is that Carlos’s sister?
3 She is Mark and Alex’s doctor.
4 Those are the students’ chairs.
NOT Those are the students’s chairs.
5 My friend’s car.
My friends’ car.
Possessive determiners and possessive ’s
3.3
The dog belongs to Joy, it’s her dog.
When the name ends in s, we still add possessive ’s.
When something belongs to more than one person, the ’s goes after the last name.
When the noun is plural and it ends in s, we only add an apostrophe (’) after the s.
The car belongs to one friend.
The car belongs to more than one friend.