Grammar Index : 2
We use the Possessive Pronoun when we want to substitute a group of words that are indicating a possession relation.
For example :
This is my book.
In this example, we can substitute my book for the possessive pronoun mine.
This is mine.
This is your disk and that's mine.
Mine substitutes the word disk and shows that it belongs to me.
The smallest gift is mine.
This is yours.
Here the possessive pronouns acts as a subject complement.
His is on the kitchen counter.
Theirs will be delivered tomorrow.