Editing Infinitive (section)

==Marking for tense, aspect and voice {{anchor|Perfect}}==
In some languages, infinitives may be marked for [[grammatical category|grammatical categories]] like [[grammatical voice|voice]], [[grammatical aspect|aspect]], and to some extent [[grammatical tense|tense]]. This may be done by [[inflection]], as with the Latin perfect and passive infinitives, or by [[periphrasis]] (with the use of [[auxiliary verb]]s), as with the Latin future infinitives or the English perfect and progressive infinitives.

Latin has present, perfect and future infinitives, with active and [[passive voice|passive]] forms of each. For details see {{slink|Latin conjugation|Infinitives}}.

English has infinitive constructions that are marked (periphrastically) for aspect: [[perfect (grammar)|perfect]], [[progressive aspect|progressive]] (continuous), or a combination of the two ([[perfect progressive]]). These can also be marked for [[English passive voice|passive voice]] (as can the plain infinitive):
*''(to) eat'' (plain infinitive, active)
*''(to) be eaten'' (passive)
*''(to) have eaten'' (perfect active) 
*''(to) have been eaten'' (perfect passive) 
*''(to) be eating'' (progressive active) 
*''(to) be being eaten'' (progressive passive) 
*''(to) have been eating'' (perfect progressive active) 
*''(to) have been being eaten'' (perfect progressive passive, not often used)
Further constructions can be made with other auxiliary-like expressions, like ''(to) be [[going to]] eat'' or ''(to) be [[about to]] eat'', which have future meaning. For more examples of the above types of construction, see {{slink|Uses of English verb forms|Perfect and progressive non-finite constructions}}.

Perfect infinitives are also found in other European languages that have [[perfect (grammar)|perfect]] forms with auxiliaries similarly to English. For example, ''avoir mangé'' means "(to) have eaten" in French.