go scribo et tu legis, _I write, and you read._

3. The verb is sometimes omitted when it can be easily supplied from the
context, especially the auxiliary sum; as,--

recte 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,--

Cicero orator fuit, _Cicero was an orator_;

Numa creatus est rex, _Numa was elected king_.

1. when possible, the Predicate Noun usually agrees with its Subect in
Gender also; as,--

philosophia est vitae magistra, _philosophy is the guide of life_.

2. Besides sum, the verbs most frequently accompanied by a Predicate Noun
are--

a) fio, evado, exsisto; maneo; videor; as,--

Croesus non semper mansit rex, _Croesus did not always remain king_.

b) Passive verbs of _making_, _calling_, _regarding_, etc.; as, creor,
appellor, habeor; as,--

Romulus rex appellatus est, _Romulus was called king_;

habitus est deus, _he was regarded as a god_.

APPOSITIVES.

169. 1. An Appositive is a Noun explaining or defining another Noun
denoting the same person or thing; as,--

Cicero consul, _Cicero, the Consul_;

urbs Roma, _the city Rome_.

2. An Appositive agrees with its Subject in Case; as,--

opera Ciceronis oratoris, _the works of Cicero, the orator_;

apud Herodotum, patrem historiae, _in the works of Herodotus, the
father of history_.

3. When possible, the Appositive agrees with its Subject in Gender also;
as,--

assentatio adjutrix vitiorum, _flattery, the promoter of evils_.

4. A Locative may take in Apposition the Ablative of urbs or oppidum, with
or without a preposition; as,--

Corinthi, Achaiae urbe, or in Achaiae urbe, _at Corinth, a city of
Greece_.

5. PARTITIVE APPOSITION. A Noun denoting a whole is frequently followed by
an Appositive denoting a part; as,--

milites, fortissimus quisque, hostibus restiterunt, _the soldiers, all
the bravest of them, resisted the enemy_.

* * * * *

THE CASES.

THE NOMINATIVE.

170. The Nominative is confined to its use as Subject, Appositive, or
Predicate Noun, as already explained. See Sec. 166-169.

* * * * *

THE VOCATIVE.

171. The Vocative is the