A pronoun stands in place of (for or pro) a noun. Examples include I, you, he/she, it, we, you, they, some, this, these and one: Alison opened the book becomes She opened it.
i.i Pronouns as subjects of singular forms of verbs:
I
you
he/she/it
1st person singular
2nd person singular
3rd person singular
i.ii Pronouns as subjects of plural forms of verbs:
we
you
they
1st person plural
2nd person plural
3rd person plural
ii
Note that pronouns decline or agree (i.e. change their form) according to their use in the sentence: