Subject-verb agreement means that the subject and verb endings agree in number. Determining singular or plural endings can be confusing because an -s ending on a noun indicates plural, whereas an -s ending on a verb indicates singular form. The subject of every sentence is either singular or plural, and that determines the ending of the verb.
In the examples below, the subjects in the sentences are underlined the verbs are italicized.
Rule 1: Singular nouns (usually without s) take singular verbs (usually with s). Plural nouns (usually with s) take plural verbs (usually without s).
The bee buzzes every night. (One bee = singular verb)
The bees buzz every night. (More than one bee = plural verb)
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