The English language subjective pronouns are I, you, he, she, it, we, who, and they. With the exception of you and it, the objective pronouns are different. (c.f.)
A subjectivepronoun acts as the subject of a sentence—it performs the action of the verb.
A demonstrative pronoun may look like a demonstrative adjective, but it is used differently in a sentence: it acts as a pronoun, taking the place of a noun.
pronoun - pronounpronoun, in English, the part of speech used as a substitute for an antecedent noun that is...
An objective personal pronoun indicates that the pronoun is acting as an object of a verb, compound verb, preposition, or infinitive phrase.
The demonstrative pronouns are "this," "that," "these," and "those." "This" and "that" are used to refer to singular nouns or noun phrases and "these" and "those" are used to refer to plural nouns and noun phrases.
An intensive pronoun is a pronoun used to emphasise its antecedent.