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We have seven kinds of pronouns in the English language (personal pronouns, reflexive and intensive pronouns, relative pronouns, interrogative pronouns, demonstrative pronouns, indefinite pronouns, and reciprocal pronouns).
The personal pronouns (and the relative or interrogative pronoun who) exhibit case. The case of a pronoun reveals how the noun it replaces would act in the sentence. We have three cases: (1) subjective case (also called nominative case), (2) objective case, and (3) possessive case.
The relative or interrogative pronoun who also exhibits case: who (subjective), whom (objective), and whose (possessive).
In the table below, please note the correct possessive form of the pronoun it. The correct form is its. Many people incorrectly use an apostrophe and write things like We enjoyed it's plot. Wrong. The word it's is the contraction of it is. We urge you to read a discussion of this problem in the section on Common Grammatical Mistakes. Click here for the beginning of that discussion.
The following table reveals the three cases of the personal pronouns.
Singular Personal Pronouns
Plural Personal Pronouns