[1910.] For tamquam instead of tamquam sī, see [2118]; with a participle, 2121.
[antequam, priusquam.]
[1911.] antequam and priusquam accompany both the indicative and the subjunctive.
ante and prius properly belong to the apodosis, and regularly stand with it if it is negative; but otherwise they are usually attracted to the protasis.
antequam is very seldom found in old Latin, and it is in general much rarer than priusquam, except in Tacitus.
IN GENERAL STATEMENTS.
[1912.] In general present statements, antequam and priusquam regularly introduce the perfect indicative or the present subjunctive: as,
membrīs ūtimur priusquam didicimus cuius ea causā ūtilitātis habeāmus, Fin. 3, 66, we always use our limbs before we learn for what purposes of utility we have them ([1613]). priusquam lūcet, adsunt, Pl. MG. 709, before ’tis light they’re always here; here lūcet is equivalent to inlūxit. ante vidēmus fulgōrem quam sonum audiāmus, Sen. QN. 2, 12, 6, we always see the flash before we hear the sound. priusquam sēmen mātūrum siet, secātō, Cato, RR. 53, always cut before the seed is ripe ([1575]). With the perfect subjunctive in the indefinite second person ([1030]): as, hoc malum opprimit antequam prōspicere potuerīs, V. 1, 39, this calamity always overwhelms you before you can anticipate it ([1731], [1558]). For prius quam, sooner than, see [1897].
[1913.] The future indicative is used a few times in general statements by old and late writers, and the perfect subjunctive after a negative clause rarely by Tacitus: as, bovēs priusquam in viam agēs, pice cornua īnfima unguitō, Cato, RR. 72, always smear the hoofs of your oxen with pitch before you drive them on the road ([1625], [1577]). deū̆m honor prīncipī nōn ante habētur quam agere inter hominēs dēsierit, Ta. 15, 74, divine honours are not paid to an emperor before he has ceased to live among men. Cicero has the perfect subjunctive in a definition: thus, prōvidentia, per quam futūrum aliquid vidētur antequam factum sit, Inv. 2, 160, foresight is the faculty through which a future event is seen before it has taken place. He also has the present indicative once: Div. 1, 120.