A SUBJECT/VERB AGREEMENT error is when the subject and verb of a sentence do not agree.

Examples:

  • There is too many things to do today.
  • My friend and his brother is on vacation.

    Corrections:

  • There are too many things to do today. (the subject is "things," plural)
  • My friend and his brother are going on vacation. (the subject is "My friend and his brother," plural)