First it might be helpful to remember that the singular form of all verbs — except “to be” and “to have” — is formed by adding “s” or “es.” For example: dives, runs, answers, crashes, presses and tosses.
When used as a subject or adjective these indefinite pronouns are always singular and, therefore, they take singular verbs.
These pronouns may be used as subjects, and they take a singular verb.
- Everyone has been invited.
- She said that something was all she wanted for her birthday.
- The Democratic leadership suggested two solutions but neither was acceptable to the committee chair.
When they are used as adjectives, the noun they modify always takes a singular verb.
- Neither solution works for the committee chair.
- Each tragedy gives the population given less time to recover from the previous shock.
The number–when used as subject of a sentence (an organized unit)—takes a singular verb.
- The number of tenants without heat is increasing.
Subjects that stand for definable units of money, measurement, time, organization, food and medical problems always take singular verbs.
- Six months is not enough time.
- Five thousand dollars is the minimum bid.
- Ham and eggs is my favorite meal.
Singular subject followed by phrases “such as,” “together with” and “as well as” take a singular verb.
- The tax measure, together with its amendments, has passed.
When all parts of a compound subject are singular and refer to same person or thing.
- The head of the expedition and mayor of the village was the same person.
When the subject is followed by the phrase “the only one of.”
- Jake is the only one of the runners who has finished.
BUT: When the subject is followed by the phrase “one of the” or “one of those,” the verb agrees with the object of the preposition
- Jake is one of those runners who have finished.
- In this case, Jake is one of many [those] runners. The verb “have” agrees with “those runners” not with Jake.)