The Learning Depot
Subject Verb Agreement: Basic Rules with Examples
Subject-verb agreement is for the most part fairly straight forward, but can be tricky when you have compound subjects joined by nor and or, collective nouns, indefinite pronouns, singular nouns that end in s, the pronoun none, inverted...
Turtle Diary
Turtle Diary: Verb Subject Agreement Video
This video covers how to make verbs and subjects agree in sentences, including how to handle verbs when the subjects are indefinite pronouns, or when using the conjunction "or."
Khan Academy
Khan Academy: Subject Verb Agreement
A video [4:52] explaining how correctly written sentences have subjects and verbs that agree.