[*] 499. By later writers and the poets the Future Participle is often used in simple agreement with a substantive to express—
- Likelihood or certainty:—
- Purpose, intention, or readiness:—
- “ēgreditur castrīs Rōmānus vāllum invāsūrus” (Liv. 3.60.8) , the Roman comes out of the camp with the intention of attacking the rampart.
- dispersōs per agrōs mīlitēs equitibus invāsūrīs (id. 31.36), while the horse were ready to attack the soldiers scattered through the fields.
- “sī peritūrusabīs ” (Aen. 2.675) , if you are going away to perish.
- Apodosis:—
[*] Note.--The participle in -dus, commonly called the Gerundive, has two distinct uses:—
(1) Its predicate and attribute use as Participle or Adjective (§ 500). (2) Its use with the meaning of the Gerund (§ 503). This may be called its gerundive use.