ā sapiente, by a philosopher.
Tarquiniō rēgnante, under the reign of Tarquin.
4. Plūs, in the Singular, is always a noun.
5. In the Ablative Singular, adjectives, when used as substantives,—
a) usually retain the adjective declension; as,—
aequālis, contemporary, Abl. aequālī.
cōnsulāris, ex-consul, Abl. cōnsulārī
So names of Months; as, Aprīlī, April; Decembrī, December.
b) But adjectives used as proper names have -e in the Ablative Singular; as, Celere, Celer; Juvenāle, Juvenal.
c) Patrials in -ās, -ātis and -īs, -ītis, when designating places regularly have -ī; as, in Arpīnātī, on the estate at Arpinum, yet -e, when used of persons; as, ab Arpīnāte, by an Arpinatian.
6. A very few indeclinable adjectives occur, the chief of which are frūgī, frugal; nēquam, worthless.
7. In poetry, adjectives and participles in -ns sometimes form the Gen. Plu. in -um instead of -ium; as, venientum, of those coming.
COMPARISON OF ADJECTIVES.
[71]. 1. There are three degrees of Comparison,—the Positive, the Comparative, and the Superlative.