We use pronouns in place of nouns when we don’t want to repeat the same noun again and again.
Meaning:
“it” refers to “my car”
Subject pronouns come before verbs.
Object pronouns come after verbs or after prepositions.
Possessive adjectives cannot be used alone. They need a noun.
Possessive pronouns must be used alone. They cannot be used with a noun. They can be a subject or an object.