English Grammar for the Utterly Confused - Laurie Rozakis 2003

A Singular Subject Must Have a Singular Verb
Chapter 5 Agreement: Matching Sentence Parts
Part 2 Usage and Abusage

Now that you can recognize singular and plural nouns, pronouns, and verbs, you will be able to make all sentence parts agree in number. Remember the rule introduced in the beginning of this chapter: A subject must agree with its verb in number.

All the other rules follow from this one. The easiest rules are these two:

• A singular subject must have a singular verb.

• A plural subject must have a plural verb.

Let’s examine the first rule.