A. To show that something belongs to a person, 's is added to nouns. For example:

She drove her father's car. She reached her sister's house. Her sister Luna opened the door. She took Sharafi's book from the table. She found Sadman's room locked from inside.

Singular nouns:
Muntaha received Bani's prize.
A freedom fighter's courage is very important.
Safin's friends joined him at the party.
Irregular plurals of nouns:
Children's garments are sold in that market.
Rumman is in a men's hostel.

An apostrophe is placed at the end of regular plural nouns:

Mira is in the girls' hostel.
Students' representatives met the Principal.
Lawyers' association protested against the administrative initiative.

's is placed at the end of singular nouns ending in s:

They visited Sirajus's new house.
We entered Anis's flat.

Only an apostrophe without 's' is also in use to avoid an unpleasant hissing sound:

They visited Sirajus' new house.

We entered Anis' flat.

B. Pronouns that are used to show one or more things belonging to a person are Possessive Pronouns.

Pronouns have two possessive forms:

See the following examples:
This is our country.
This book is mine.
Ours is a beautiful country.

C. Identify the possessives in the following story:

Two sick men were given the same room in a hospital. One man could sit up in his bed for about an hour. His bed was next to the room's only window. The other man spent all his time lying on his bed opposite the window. The men talked for hours almost every day. They talked about their wives and children, their homes, their jobs and almost about everything.

Every afternoon the man in the bed by the window would sit up and talked to his roommate about all the things he could see outside the window. The man on the other bed eagerly waited for this speaking and listening time. His friend's vivid descriptions of passing things seen through the window inspired him to live.

The window overlooked a park with a lovely lake. Ducks and swans play on the water, while children float their paper boats. A wonderful view of the skyline can be seen in the distance. The man by the window told his friend all this in detail. The listener would close his eyes and see everything in his mind's eye.

D. Singular and plural possessive nouns:

Join the sentences with the help of possessives. One is done for you:

1. This is a tiger. Its body has stripes. => The tiger's body has stripes.
2. There are spiders. Their webs catch insects.
3. There is a book on the table. Its pictures are obscure.
4. There is a cat. Its baby is called a kitten.
5. There is one shark. Its teeth are sharp.
6. There are sheep. Their fur keeps them warm.
7. Bangladesh is a beautiful country. Its nature is green.