Subjects can be singular or plural. Think of singular and plural as mathematical concepts: Singular = 1; Plural = 2 or more. Matt eats pizza. In this sentence, the subject is Matt, which is singular; ...

We can use singular or plural verbs with many collective nouns ... They will endorse all promotions from grade C to grade B for the coming year. My firm, which was established in 1932, has ...

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 ...