1. Subject-verb agreement describe the proper match between subjects and verbs. Because subjects and verbs are either singular or plural, the subject of a sentence and the verb of a sentence must agree with each other.2. A singular subject takes a singular verb, not a plural verb as plural means/denotes more than one or two, and singular only conveys one.3. Same thing, a plural subject must take on a plural verb.4. The basic rule of subject-verb agreement states that singular subject's only takes a singular verb, no more than one.5. As the basic rule says, a singular subject may only take a singular verb, therefore it applies the same thing to a plural subject. A plural subject takes a plural verb.