The possessive case of most singular nouns, whether common or proper, is formed by adding – ’s to the end. See the following examples: This is Mary and her dog. The dog is Mary’s pet; Mary is not the dog’s pet. This thick curtain is capable of shutting out the summer sun’s heat and light.

We add 's to singular nouns to show possession: We are having a party at John's house. Michael drove his friend's car. We add ' to plural nouns ending in -s: This is my parents' house. Those are ladies' shoes.

Look at these examples to see how we use possessive 's. Mohammed is my brother's son. My grandpa's beard is white. This is my grandparents' house.

Possessive 's and s' This is Sam's bicycle. Andy is Emma's brother. ‘Have you seen Sam and Emma's garden?’ ‘It's really big.’ My parents' friends came for dinner. Our children's toys are everywhere!