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 ...
A sentence in the active voice typically has the formation of Subject Verb Object SVO. The verb needs to be in agreement with the subject for proper grammar formation. We have certain rules to ...
However, there are many types of noun and noun phrase in English, and it can be difficult to know if a particular noun takes a singular verb (such as DOES / HAS / AM / IS ) or a plural verb (DO / HAVE ...