All Commands of the Direct Discourse, on passing into the Indirect, fall into the subjunctive, because they are in reality dependent on some verb like imperāvit, to be supplied in thought:
proinde nē gravārētur sē spectandum praebēre, [XXI, 289] (direct form, Nōlī gravārī tē spectandum praebēre); satis cōnstat Sullam . . prōclāmāsse, vincerent, dummodo scīrent, [XXVII, 12-15] (direct form, Vincite, dummodo sciātis).
7. Subordinate Clauses in Indirect Discourse.
All Subordinate Clauses of the Indirect Discourse have their verbs in the subjunctive mood:
Tatius . . Tarpēiae optiōnem mūneris dedit, sī . . perdūxisset, [II, 19-21] (direct form, dō or dabō optiōnem mūneris, sī . . perdūxeris: see note); Illa petiit quod gererent, [II, 21] (direct form, Petō quod . . geritis).
[1] See also below, Ablative Absolute, [K 3].
[2] The form with in is the more exact.
[3] This is merely a special form of (2), but its importance entitles it to separate treatment.