indefinite pronouns

The singular indefinite pronouns are anybody, anyone, each, either,
everybody, everyone, everything, neither, nobody, no one, nothing, one,
somebody, someone, and something. As subjects, these pronouns agree in
number with singular verbs.

Everyone in these seats is invited to the party.
Neither of the contestants has to leave the studio.
Everything in those rooms was ready to be moved.

The plural indefinite pronouns are both, few, many, and several. As
subjects, these four pronouns agree in number with plural verbs.

Both of the staircases need painting.
Many of the brochures contain useful information.
Several of the candidates in this year’s election are debating in
the auditorium.

As subjects, some pronouns (all, any, more, most, none, and some) can
be singular or plural
depending on the object of the preposition in the
prepositional phrases that follow them.

All of the pizza was eaten. (All is a singular subject because pizza, the
object of the preposition, is singular. Thus, a singular verb, was, is
required.)

All of the pizzas were eaten. (All is a plural subject because pizzas,
the object of the preposition, is plural. Thus, a plural verb, were, is
required.)

Most of the project is completed.
Most of the projects are completed.
More of the room needs brighter colors.
More of the rooms need brighter colors.
None of this paper is stained.
None of these papers are stained.