Final answer:
Indefinite pronouns, such as 'anyone' and 'everything', do not specify the nouns they replace and may take singular or plural verbs depending on the context or their referents.
Step-by-step explanation:
Indefinite pronouns are words that refer to non-specific people, places, or things, such as 'someone', 'anyone', 'each', and 'everything'. These pronouns can take singular or plural verbs depending on the context. For instance, the pronouns anybody, anyone, anything, and each typically require a singular verb as in 'Everyone on the team practices all season.'
Conversely, pronouns like both, few, many, and several take a plural verb: 'Several of the athletes on the team come from the same high school.'
Some indefinite pronouns such as all, any, more, most, and some can be paired with either singular or plural verbs depending on their referent. If 'most' refers to 'class' (a singular noun), we use a singular verb as in 'Most of the class has proposed researching a topic related to climate change.' When 'most' refers to 'students' (a plural noun), a plural verb is used: 'Most of the students have proposed researching a topic related to climate change.'