When the adjective limits or describes, and, at the same time, adds to the predicate, it is called a predicate adjective.

A comma is often used to separate a subject with several modifiers, or with a long modifier, from the predicate verb.

Here, who commands belongs to the predicate man, and the meaning is, "I am the commander."

What support these examples give to this grammarian's new notion of "the objective indefinite" or to his still later seizure of Greene's doctrine of "the predicate-nominative" the learned reader may judge.

The most purely relational verb is the verb to be, which is called the copula or linking verb, for the very reason that it joins predicate words to the subject: