I just completed the possessive pronouns and within the session I just can't figure it out how I should use -e in the end of the pronoun. If anyone could comment, I would highly appreciate.
After some search, I think that the explanation could contain a table like this Table: German possessive pronouns in the nominative case
Nominative - possessive refering to masculine/neuter - possessive refering to feminine Ich - mein - meine du - dein - deine er - sein - seine sie - ihr - ihre es - sein - seine wir - unser - unsere ihr - euer - eure Sie - ihr - ihre
German possessive pronouns and not only -e, but other endings, too. It all depends on the gender, case and number of the word that the subject possesses.
But in short, pronouns get -e before feminine nouns and nouns in plural.
For example: mein Bruder (masculine) - my brother mein Handy (neuter) - my cell phone
meine Schwester (feminine) - my sister meine Uhr (feminine) - my clock
meine Eltern ( plural) - my parents meine Sache (plural) - my stuff
Of course, all of these words get different endings in different cases - this only applies to feminine and plural nouns in Nominative and Accusative.
It's worth noting that there are possessive pronouns and possessive adjectives, or as this post calls them, dependent and independent possessive pronouns; which are two separate particles that decline differently.
Possessive adjectives/dependent possessive pronouns decline like the indefinite article - ein
(Independent) possessive pronouns decline like the definite article - der, die, das