How would you rate your command of English grammar? On a five-point scale, are you (1) very weak, (2) weak, (3) average, (4) strong or (5) exceptional? Do you have a number or level in mind? Good. Now ...
Subject-verb agreement means that your verb must be conjugated, or changed, to fit (or agree) with the subject. Subjects can be singular or plural. Think of singular and plural as mathematical ...
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