Assess students' ability to apply subject–verb agreement rules in complex sentences. Include items that require choosing or supplying the correct verb forms for compound subjects, intervening phrases, relative clauses, collective nouns, indefinite pronouns, and constructions with "as well as," "along with," "neither...nor," "either...or," and inverted word order. Focus on practical application through error identification, sentence correction, and short rewrites aligned to Grade 9–12 learning goals.