3. The verb is sometimes omitted when it can be easily supplied from the context, especially the auxiliary sum; as,—
rēctē ille (sc. facit), he does rightly; consul profectus (sc. est), the consul set out.
PREDICATE NOUNS.
[167]. A PREDICATE NOUN is one connected with the Subject by some form of the verb Sum or a similar verb.
[168]. A Predicate Noun agrees with its Subject in Case;[[47]] as,—
Cicerō ōrātor fuit, Cicero was an orator;
Numa creātus est rēx, Numa was elected king.
1. when possible, the Predicate Noun usually agrees with its Subect in Gender also; as,—
philosophia est vītae magistra, philosophy is the guide of life.
2. Besides sum, the verbs most frequently accompanied by a Predicate Noun are—
a) fiō, ēvādō, exsistō; maneō; videor; as,—