Compound Subject

compound subject examples

In a compound subject, the simple subjects are joined by words like "and," "or," or "nor" (called coordinate conjunctions) or pairings like "either/or" and "neither/nor" (called correlative conjunctions).

Easy Examples of Compound Subjects

Real-Life Examples of Compound Subjects

Why Compound Subject Are Important

Here are two good reasons with care about compound subjects.

(Reason 1) Match your compound subject to the right verb.

After using a compound subject, writers are sometimes unsure whether to use a singular or plural verb. Here are the rules:

(Rule 1) "And" creates a plural.

When "and" joins two or more singular simple subjects, the verb is plural. For example:

(Rule 2) "Or" does not create a plural.

When "or" joins two or more singular simple subjects, the verb is singular. For example:

It's the same deal with "nor." For example:

(Rule 3) "As well as" does not create a plural.

Terms like "in conjunction with," "as well as," and "alongside" do not act like "and." They do not create a plural. For example:

Read more about subject-verb agreement.

(Rule 4) "Either/or" and "Neither/nor" do not create a plural.

When the simple subjects are singular, "either/or" and "neither/nor" do not create a plural. For example:

However, when one of the simple subjects is plural, things get tricky. There are two conventions: the Logic Rule and the Proximity Rule.

The Logic Rule

Under the Logic Rule, the verb is plural if one of the simple subjects is plural. For example:

The Proximity Rule

Under the Proximity Rule, the simple subject nearest the verb governs it. For example:

Top Tip

So, which rule should you use? Well, use both. Keep everyone happy. How?

If one of your simple subjects is plural, deliberately place it near the verb.

(Reason 2) Think about marking the end of a long, compound subject with a comma.

It is possible to end a compound subject with a comma to group it neatly for your readers. This is not a popular practice amongst grammarians. However, if you think it helps, do it. For example:

Read more about ending a long, compound subject with a comma.

Key Points

This page was written by Craig Shrives.