Instead, pronouns are classified based on their function in a sentence:
* Personal pronouns: I, me, you, he, him, she, her, it, we, us, they, them
* Possessive pronouns: mine, yours, his, hers, its, ours, theirs
* Reflexive pronouns: myself, yourself, himself, herself, itself, ourselves, yourselves, themselves
* Intensive pronouns: (Same as reflexive pronouns, but used for emphasis)
* Demonstrative pronouns: this, that, these, those
* Interrogative pronouns: who, whom, whose, what, which
* Relative pronouns: who, whom, whose, which, that
* Indefinite pronouns: all, another, any, anybody, anyone, anything, both, each, either, everybody, everyone, everything, few, many, more, most, neither, nobody, none, no one, nothing, one, other, several, some, somebody, someone, something
The key point is that pronouns change form based on their function, not on suffixes like "-ing" or "-ed."