Pronouns must agree in number, in gender, and person with their antecedents.
If the subject of the sentence is a pronoun, that pronoun needs to agree in number with the verb.
Some indefinite pronouns are always singular:
anybody | everybody | anyone | everyone |
anything | everything | another | each |
either | neither | one | no one |
nobody | someone | somebody |
Some are always plural:
both | few | several | many |
And some can be both singular or plural depending on the kind of noun they refer to.
And some can be both singular or plural depending on the kind of noun they refer to.
all | any | most | none | some |
A relative pronoun is a pronoun that refers to a noun preceding it in the sentence. This noun is called its antecedent. Relative pronouns need to agree with their antecedents in number.