The subject-verb agreement is tricky in a sentence or dependent clause that begins with the words "there, that, which, who," or "what" because they are not real subjects to determine agreement. You ...

the English article system, verb forms, subject-verb-agreement, and sentence structure, the concise explanation of which can be incorporated into feedback on students’ writing.

A regular verb is one that conforms to the rules of grammar, whereas an irregular verb is one that does not. Keep in mind that each sentence you write will need to have agreement between its subject ...