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Pronouns that may be used only as subjects or subject complements: I, he, she, we, they, who, whoever.
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Pronouns that may be used only as objects or objective complements: me, him, her, us, them, whom, whomever.
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Common pronouns that may be used as either subjects or objects: you, it, everyone, anyone, no one, someone, mine, ours, yours, theirs, either, neither, each, everybody, anybody, nobody, somebody, everything, anything, nothing, something, any, none, some, which, what, that.
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Pronouns that show possession: my, mine, your, yours, his, her, hers, its, our, ours, their, theirs, whose.