A pronoun is a word that takes the place of a noun, but an object pronoun is never used as subject of a sentence. It is used everywhere...
A pronoun is a word that takes the place of a noun, but an object pronoun is never used as subject of a sentence. It is used everywhere else (direct object, indirect object, object of a preposition). Object pronouns come after either a verb or a preposition.
She will give him some food.
My brother and I did it.
It is just me at the door.
She loves sitting next to me.