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Indefinite Pronouns
Use a singular verb when the subject is a singular indefinite pronoun (each, either, neither, one, everyone, everybody, everything, someone, somebody, anything, nobody, another).
Each of my friends loves science, technology, engineering, and math (STEM).
Some indefinite pronouns (all, any, most, none, some) can be either singular or plural. Check the noun in the prepositional phrase after the verb.
Most of my friends are on my STEM team.
(The noun friends is plural, so the verb are is plural.)
Most of our experiment is complete.
(The noun experiment is singular, so the verb is is singular.)