The Indicative Mood is used for most direct assertions and interrogations: as,valēsne? valeō, are you well? I am well.
The Subjunctive Mood has many idiomatic uses, as in commands, conditions, and various dependent clauses. It is often translated by the English Indicative; frequently by means of the auxiliaries may, might, would, should;
sometimes by the (rare) Subjunctive; sometimes by the Infinitive; and often by the Imperative, especially in prohibitions. A few characteristic examples of its use are the following:—
eāmus, let us go;nē abeat, let him not depart.
adsum ut videam, I am here to see (that I may see).
tū nē quaesieris, do not thou inquire.
beātus sīs, may you be blessed.
quid morer, why should I delay?
nesciō quid scrībam, I know not what to write.
sī moneam, audiat, if I should warn, he would hear.
The Imperative is used for exhortation, entreaty, or command; but the Subjunctive is often used instead (§§ 439, 450):—
līber estō, he shall be free.
nē ossa legitō, do not gather the bones.
The Infinitive is used chiefly as an indeclinable noun, as the subject or complement of another verb (§§ 452, 456. N.). In special constructions it takes the place of the Indicative, and may be translated by that mood in English (see Indirect Discourse, § 580 ff.).
The Present Participle (ending in -ns) has commonly the same meaning and use as the English participle in -ing; as, vocāns, calling;legentēs, reading. (For its inflection, see egēns, § 118.)
The Future Participle (ending in -ūrus) is oftenest used to express what is likely or about to happen: as, rēctūrus, about to rule;audītūrus, about to hear.
The Perfect Participle (ending in -tus, -sus) has two uses:—
It is sometimes equivalent to the English perfect passive participle: as, tēctus, sheltered;acceptus, accepted;ictus, having been struck; and often has simply an adjective meaning: as, acceptus, acceptable.
It is used with the verb to be (esse) to form certain tenses of the passive: as, vocātus est, he was (has been) called.
The Gerundive (ending in -ndus), has two uses:—
It is often used as an adjective implying obligation, necessity, or propriety (ought or must): as, audiendus est, he must be heard.
In the oblique cases the Gerundive commonly has the same meaning as the Gerund (cf. § 159. a), though its construction is different. (For examples, see § 503 ff.)
The Gerund is a verbal noun, corresponding in meaning to the English verbal noun in -ing (§ 502): as, loquendī causā, for the sake of speaking.
The Supine is in form a noun of the fourth declension (§ 94. b), found only in the accusative ending in -tum, -sum, and the dative or ablative ending in -tū, -sū.
The Supine in -um is used after verbs and the Supine in -ū after adjectives (§§ 509, 510):—
vēnit spectātum, he came to see;mīrābile dictū, wonderful to tell.
The Perfect Indicative has two separate uses,—the Perfect Definite and the Perfect Historical (or Indefinite).
The Perfect Definite represents the action of the verb as completed in present time, and corresponds to the English perfect with have: as, scrīpsī, I have written.
The Perfect Historical narrates a simple act or state in past time without representing it as in progress or continuing. It corresponds to the English past or preterite and the Greek aorist: as, scrīpsit, he wrote.
The Tenses of the Subjunctive are chiefly used in dependent clauses, following the rule for the Sequence of Tenses; but have also special idiomatic uses (see Syntax).
For the use of Tenses in the Imperative, see §§ 448, 449.