When the Gerund would have an object in the Accusative, the Gerundive The gerundive construction is probably the original one. is generally used instead. The gerundive agrees with its noun, which takes the case that the gerund would have had:— parātiōrēs ad omnia perīcula subeunda (B. G. 1.5) , readier to undergo all dangers. [Here subeunda agrees with perīcula , which is itself governed by ad . The (inadmissible) construction with the gerund would be ad subeundum perīcula ; ad governing the gerund, and the gerund governing the accusative perīcula .] For details, see §§ 504 - 507 . In this use the gerund and the gerundive are translated in the same way, but have really a different construction. The gerundive is a passive participle, and agrees with its noun, though in translation we change the voice, just as we may translate vigiliae agitandae sunt ( guard must be kept ) by I must stand guard. In the gerundive construction the verbs ūtor , fruor , etc., are treated like transitive verbs governing the accusative, as they do in early Latin (§ 410 . a. N. 1): as, —ad perfruendās voluptātēs (Off. 1.25) , for enjoying pleasures.