B. Tenses of the Subjunctive.
[318]. These follow the regular principle for the Sequence of Tenses, being Principal if the verb of saying is Principal; Historical if it is Historical. Yet for the sake of vividness, we often find the Present Subjunctive used after an historical tense (Repraesentātiō); as,—
Caesar respondit, sī obsidēs dentur, sēsē pācem esse factūrum, Caesar replied that, if hostages be given, he would make peace.
a. For the sequence after the Perfect Infinitive, see [§ 268], 2.
CONDITIONAL SENTENCES IN INDIRECT DISCOURSE.
Conditional Sentences of the First Type.
[319]. A. THE APODOSIS. Any tense of the Indicative is changed to the corresponding tense of the Infinitive ([§§ 270]; [ 317], a).
B. THE PROTASIS. The protasis takes those tenses of the Subjunctive which are required by the Sequence of Tenses.
Examples:—
| DIRECT. | INDIRECT. |
| sī hōc crēdis, errās, |
dīcō, sī hōc crēdās, tē
errāre; dīxī, sī hōc crēderēs, tē errāre. |
| sī hōc crēdēs, errābis, |
dīcō, sī hōc crēdās, tē
errātūrum esse; dīxī, sī hōc crēderēs, tē errātūrum esse. |
| sī hōc crēdideris, errābis, |
dīcō, sī hōc crēderīs, tē
errātūrum esse; dīxī, sī hōc crēdidissēs, tē errātūrum esse. |
| sī hōc crēdēbās, errāvistī, |
dīcō, sī hōc crēderēs, tē
errāvisse; dīxī, sī hōc crēderēs, tē errāvisse. |