Allen and Greenough's New Latin Grammar for Schools and Colleges
J. B. Greenough, G. L. Kittredge, A. A. Howard, Benj. L. D'Ooge, Ed.

1. “dūrus compōnere versūs ” (Hor. S. 1.4.8) , harsh in composing verse.
2. “ cantārī dīgnus ” (Ecl. 5.54) , worthy to be sung. [In prose: quī cantētur .]
3. “fortis trāctāre serpentīs ” (Hor. Od. 1.37.26) , brave to handle serpents.
cantāre perītī; (Ecl. 10.32), skilled in song.
4. “facilēs aurem praebēre ” (Prop. 3.14.15) , ready to lend an ear.
5. “nescia vincī pectora ” (Aen. 12.527) , hearts not knowing how to yield.
6. tē vidēre aegrōtī; (Plaut. Trin. 75), sick of seeing you.

[*] a. Rarely in poetry the infinitive is used to express result:—

1. “fingit equum docilem magister īre viam quā mōnstret eques ” (Hor. Ep. 1.2.64) , the trainer makes the horse gentle so as to go in the road the rider points out.
2. “hīc levāre ... pauperem labōribus vocātus audit ” (Hor. Od. 2.18.38) , he, when called, hears, so as to relieve the poor man of his troubles.

[*] Note.--These poetic constructions were originally regular and belong to the Infinitive as a noun in the Dative or Locative case (§ 451). They had been supplanted, however, by other more formal constructions, and were afterwards restored in part through Greek influence.

[*] b. The infinitive occasionally occurs as a pure noun limited by a demonstrative, a possessive, or some other adjective:—

1. “hōc nōn dolēre ” (Fin. 2.18) , this freedom from pain. [Cf. “tōtum hōc beātē vīvere” (Tusc. 5.33) , this whole matter of the happy life.]
2. nostrum vīvere (Per. 1.9), our life (to live).
3. scire tuum (id. 1.27), your knowledge (to know).

Exclamatory Infinitive