#sī erum īnsimulābis malitiae, male audiēs#, T. _Ph._ 359, _you’ll hear
what you won’t like, if you insinuate anything wrong against master_.
#vīcīnīs bonus estō: sī tē libenter vīcīnitās vidēbit, facilius tua
vēndēs; sī aedificābis, operīs, iūmentīs, māteriē adiuvābunt#, Cato,
_RR._ 4, _be obliging to your neighbours: if the neighbourhood looks on
you with favour, you will find a readier sale for your produce; if you
fall to building, they will help you with labour, draught animals, and
building material_. #sī id audēbis dīcere, causam inimīcī tuī
sublevābis#, _Caecil._ 12, _if you venture to say that, you will promote
the cause of your enemy_. #sī fortūna volet, fīēs dē rhētore cōnsul; sī
volet haec eadem, fīēs dē cōnsule rhētor#, J. 7, 197, _if fortune shall
ordain, a magnate from a teacher thou shalt be; again shall she ordain,
a teacher from a magnate shalt thou be_. #nōn modo nōn laedētur causa
nōbilitātis, sī istīs hominibus resistētis, vērum etiam ōrnābitur#,
_RA._ 138, _the interests of the nobility will not be damaged, if you
resist those creatures; oh no, on the contrary, they will be promoted_.
The clause with #sī# is apt to take the future perfect (2061). The
future in the apodosis often denotes action holding good at all times:
as, #dēfēnsor prīmum, sī poterit, dēbēbit vītam eius, quī īnsimulābitur,
quam honestissimam dēmōnstrāre#, _Inv._ 2, 35, _the advocate ought in
the first place, if he can, to prove that the life of the accused is
eminently respectable_. #quod adsequēmur, sī cavēbimus nē in
perturbātiōnēs incidāmus#, _Off._ 1, 131, _we shall attain this end if
we take care not to be subject to fits of passion_. Sometimes in
exemplifications: #sī patriam prōdere cōnābitur pater, silēbitne
fīlius?# _Off._ 3, 90, _if a father shall try to betray his country,
will the son keep silent?_ But see 2090.