phrastically, by using essĕ with the Past Participle: mŏnĭtus essĕ dīcĭtŭr he is said to have been warned; dīcunt Caesărem mŏnĭtum essĕ they say that Ccesar was warned.
The Participle may be also used alone: dīcunt Caesărem mŏnĭtum.
§ 201. For the Future Infinitive Active the Future Participle is used: mŭlĭĕrem crēdĭdĭt mŏrĭtūram he believed that the woman would die.
essĕ is sometimes inserted.
§ 202. The Future Infinitive Passive is expressed:
(1) By using īrī with the Supine in -um. See § 194.
This form cannot be used when the subject of the Infinitive is the same as that of the Finite Verb, as then there is nothing for the Supine lo govern; hence, urbs captum īrī vĭdĕbătur {the city seemed to be going to be captured) is bad Latin.
(2) By using fŏrĕ (Fut. Infin. of essĕ), followed by ŭt, with the Subjunctive Present or Imperfect, according to the Sequence of Tenses (§ 226): dīcit fŏrĕ ŭt urbs căpĭātŭr he says that (it will be that) the city will be captured; dīxĭt fŏrĕ ŭt urbs căpĕrētĕr he said that the city would be captured.
(3) The Infinitive of the Future Perfect Passive is expressed by using fore with the Passive Participle: crēdit urbem căptam fŏrĕ he believes the city will have been captured.
§ 203.Uses of the Infinitive.
The Infinitive has three main usages:
(A) As a Verbal Noun, as Subject or Complement to a Verb: vīvĕrĕ iūcundum est living is pleasant; cŭpĭō dīscĕrĕ I-desire to-learn.
(B) In dependent construction, to represent a Finite Verb: dīcĭt hostēs advĕnīrĕ he says that the enemy are coming, where advĕnīrĕ represents advĕnĭunt.
(C) As a Predicate in place of a Finite Verb: hostēs
