Stand for, refer to, or replace a noun or a noun phrase within a text
Antecedent
The word or words that a pronoun stands for
Pronouns can also be a direct reference to an outside situation
Animals closely related to people can be referred to by he, him, and his or she, her, and hers
Use it and its to refer to inanimate objects except ships, which are always referred as she
Countries and schools are sometimes referred to by she or her
Traditionally, the pronouns he, him, and his have been used for mixed groups or groups in which the sex is unknown. Many people now object to this use, so they use both the masculine and feminine forms or the plural forms to avoid the problem
If I, me, my or mine or their plural counterparts are part of a pair or a series, put them last
Reflexive Pronouns
Used as the object of the verb form or preposition to refer to the subject of the sentence
Intensive Pronouns
Occur directly after the word it modifies or at the end of the clause
Reciprocal Pronouns
Each part of the subject did the action and also received the action
Demonstrative Pronouns
Occur alone, do not precede nouns, can show distance or contrast
Use singular verbs with compound pronouns and use singular pronouns to refer to them in formal writing
Interrogative Pronouns
Who, whom, whose, which, and what can begin questions
Relative Pronouns
Introduce dependent clauses, can be who, whom, whose, which, that
That is a neutral form, can be a substitute for both who (+human) or which (-human)
In informal writing, whom is optional; in formal writing, whom must be used
That, which, and whom are the only relative pronouns that can be left out
Who, whom, and whose can be used in both essential/restrictive and nonessential/non-restrictive clauses
That instead of which is used only in essential or restrictive clauses, so do NOT put commas around clauses beginning with that
Use which in nonessential or nonrestrictive clauses. Separate nonessential clauses from the rest of the sentence by commas