This is her / hers bag.
her
This dog is her / hers.
hers
This dog is their / theirs.
theirs
This is my / mine dog.
my
This is their / theirs guitar.
their
This coffee isn't yours, it's my / mine.
mine
Is this skateboard him / his?
his
This car is my / mine.
mine
Do you like our / ours house?
our
These bags are her / hers.
hers
Their / theirs boots are dirty.
their
Ours / our classroom is nice.
our
Are these headphones your / yours?
yours
