Grammar Notes: Subject-Verb Agreement

The subject and verb must work together (agree).

 he, she, it  and singular nouns  used with most present tense verbs, add an –s 

Examples:

·         Dog barks

·         Car moves

·         He jumps

·         She sings

·         It hops

Plural nouns or I, you, we, they + present tense verb (DO NOT add an –s)

Examples:

·         Birds fly

·         Frogs hop

·         I live

·         You sing

·         They dance

The Verb to be (infinitive) 

Use is or was to agree with a singular noun.

Use are or were to agree with a plural noun.