Pronouns are words which can be used in the place of nouns. The personal pronouns in the following sentences are underlined.
e.g. She will do the work herself.
They gave it to him.
We want to know who was there.
In the following examples, pronouns are used in the place of nouns, instead of repeating the nouns.
e.g. I saw a boy on the steps. He seemed to recognize me.
My friend and her brother like to ski. They ski whenever they can.
In the first example, the pronoun he is used instead of repeating the noun boy. In the second example, the pronoun they is used instead of repeating the nouns friend and brother.