The pronouns of everyone, everyone, everyone, everyone, someone, someone and someone are singular and require singular verbs. Pronouns are neither singular nor singular and require singular seditions, although they seem, in some way, to relate to two things. Subjects and verbs must correspond in number (singular or plural). So, if a subject is singular, its verb must also be singular; If a subject is plural, its verb must also be plural. For pronouns that can be either singular or plural, you should carefully examine the prepositional sentence of the + noun to determine whether the meaning is singular or plural. Basic principle: singular subjects need singular verbs; Plural subjects need plural abdelle. My brother is a nutritionist. My sisters are mathematicians.