You can add "e" sound or it ends with "ه" you shoud add "ى" and then add someone name or subject,
our car: ماشين ما
Their home: خانه ى آنها
Your flat: آپارتمان شما
And in the other way you can use this pronoun instead of subject:
ام (am) for I
ات (at) for you( singular)
اش (ash) for he/he/it
مان (man) for we
تان(tan) for you (plural)
شان (shan) for they
Like these
خانه ام : my home
خانه ات :your home
خانه اش: her/his/its home
کلاسمان : our class
کلاستان: your class
کلاسشان: their class