Possessive Pronouns.
Mine, ours, thine, yours, his, hers, its and theirs are Possessive Pronouns. They are used on various occasions.
# When the noun to which the Possessive Pronoun belongs is understood.
> My hobby is collecting stamps; what’s yours?
> I don’t know what his name is; but hers is Kate.
> I found your hat; not mine though.
> The red stick is yours; the black one, mine.
> His is that, mine is this.
> Which is ours and which is theirs?
Also, Note the following idiomatic uses.
ü This coat of mine needs several buttons.
ü These letters of yours I shall always keep.
ü That boy of hers is growing fast.
[This Talking Video - Play / Best in - HD Quality - 720p (or 1080p).]