* A pronoun is a word that
takes the place of one or more
nouns.
* A personal pronoun is a pronoun that is used
to refer to people or things.
* Personal pronouns are the most used
pronouns.
* Personal pronouns can be used in the subject,
or the object of a verb or a preposition.
** Example: The story scares Tom. It scares him.
It and him are the personal pronouns.
* A subject pronoun is a personal pronoun in
the nominative case used as the subject of a
sentence.
** Example: He especially likes ranch with the
salad. He is the subject pronoun.
* Object pronoun: a personal pronoun in the
objective case, used as an object of a verb or a
preposition.
** Example: The doctor recommended that
medicine to us. Them and us are the object
pronouns.
Practice this: http://pronounpalace.weebly.com/practice.html