If we construct a sentence, the verb and subject must match in number and person. So if the subject of the singular number is the first person, the verb must be of the singular number. If the subject has a plural number, third person, the verb must be plural number. Here is the article to end all articles on the asubject-verb agreement: 20 rules of the subject-verb agreement. Students will be able to pass one quiz at a time by learning these rules. 15. Mathematics (is, are) John`s favorite subject, while civics (is, are) Andreas` favorite subject. Once your students have a solid understanding of themes, predicates, and objects, they are well prepared to create masterful complex sentences. Semimodeal Verbs – Uses Semi-modern verbs are: need, dare, should, used.