Possessiv adjectives are used to show possession or ownership of something.While we use them when we refer to people, it is more in the sense of relationship than ownership.
The possessive adjectives in English are as follows :
SUBJECT I YOU HE SHE IT WE THEY
POSSESSIVE ADJ MY YOUR HIS HER ITS OUR THEIR

The possessive adjective needs to agree with the possessor and not with the thing that is possessed.
For Examples :
 My car is very old.
 Her boyfriend is very friendly.
 Our dog is black.
 Their homework is on the table.


Like all adjectives in English they are always located directly in front of the noun they refer to.
(possessive adjective + noun )
We do not include an S to the adjective when the noun is plural like in many other languages.
For examples :
 Our cars are expensive. (correct )
 Ours cars are expensive.( incorrect)
i will be continue..