possessive's
You add 's to singular nouns to show possession.
- Marina's father = her father
- Jose's sister= his sister
You add s' to regular plural nouns.
- the parents' house = their house
- the boys' mother= their mother
You add 's to irregular plural nouns.
- the children's aunt = their aunt
- the men's room = their room
Exercises 1 2 3 4 5 6