also refer to a past situation contrary to fact: (Quintilian) 'it is unlikely that he would have told a lie unless he had been desperate.' (Livy) 'but take this message to him, that I would have died better if I had not married on the day of my funeral!' Just as is used to make a future passive infinitive, so can occasionally be used to make a potential passive infinitive. However, this is very rare, and only two instances have been noted: (Caesar) 'if at that very moment certain reports had not been brought of Caesar's victory, most people reckoned that the town would have been lost' The perfect infinitive of can also be used in the main clause of an unreal past conditional, that is, to write 'could have done' instead of 'would have done', since the two are close in meaning: (Caesar) 'but most people think that if he had been prepared to follow up the pursuit more vigorously, the war could have been finished on that day' Indirect questions Indirect questions in Latin use the subjunctive mood. Following the sequence of tenses rule, primary tenses (present, perfect, periphrastic future) are used when the context is primary, and historic tenses (imperfect, pluperfect, and imperfect periphrastic future) when the context is historic. Similar tenses are usually used after the phrase 'I do not doubt'. However, when the introductory verb is a historic present, or where there is no introductory verb, the writer has a choice, and can use either primary or historic sequence, or even a mixture of the two. The periphrastic tenses with the future participle are used only in indirect questions and after 'I do not doubt that'. In other kinds of indirect sentences (e.g. after verbs of command or fearing) the present or imperfect subjunctive are used with a future meaning. For the most part in subordinate clauses in , the verb is in one of the four basic subjunctive tenses (present, imperfect, perfect, pluperfect); the periphrastic subjunctive is not usually used. Contemporaneous situation If the sentence is an indirect question referring to the same time as the main verb, the present subjunctive is normally used after a primary tense verb: (Cicero) 'they are asking me where the money is' The present subjunctive after would also normally refer to a current situation: (Cicero) 'I am sure you know what town I am from' However, sometimes, the