Nouns that begin with a capital letter are proper nouns. They have a specific name or title and refer to a particular person, place, thing, or idea. Common nouns do not begin with capital letters because they are less specific. In general, pronouns can be personal, indefinite, interrogative, and demonstrative. Note that there are no apostrophes used with possessive personal pronouns.
Adjectives modify nouns.
An adjective can modify a pronoun when it is used as a noun. Possessive pronouns can be used as adjectives. Articles are always adjectives. They always modify nouns. A VERB is a word that expresses action, makes a statement, or shows a link between word relationships.