The rules that cover 90% of questions
- Each, every, either, neither, everyone → always singular. "Each of the boys is present."
- Either…or / Neither…nor → verb agrees with the nearer subject.
- As well as / along with / together with / in addition to → verb agrees with the first subject (these phrases are parenthetical).
- A number of = plural; The number of = singular.
- One of the + plural noun → singular verb. "One of the students was absent."
- Two nouns = one idea (bread and butter, rice and curry) → singular.
- Collective nouns (team, jury, committee) → singular when acting as a unit, plural when members act separately.
- Uncountables — news, mathematics, physics, politics, economics → singular ("Politics is dirty").
- Distance, time, money, weight as one amount → singular ("Ten kilometres is a long walk").
- "The" + adjective for a class of people → plural ("The poor are often ignored").
- "A pair of ..." → singular even though the noun is plural ("A pair of shoes is here").
- A relative pronoun (who/which/that) takes a verb agreeing with its antecedent.