Future perfect - Wikipedia
https://en.wikipedia.org/wiki/Future_perfectIn Latin conjugation, the active future perfect is formed by suffixing the future imperfect forms of esse "to be" to the perfect stem of the verb. An exception is the active indicative third person plural, where the suffix is -erint instead of the expected -erunt. E.g. amaverint, not **amaverunt (which is the present perfect form). The passive future perfect is formed using the passive perfect participle and the future imperfect …
Latin tenses - Wikipedia
https://en.wikipedia.org/wiki/Latin_tensesLatin has six main tenses: three non-perfect tenses (the present, future, and imperfect) and three perfect tenses (the perfect, future perfect, and pluperfect). In technical language, the first three tenses are known as the īnfectum tenses, while the three perfect tenses are known as perfectum. The two sets of tenses are made using different stems. For example, from the verb faciō 'I do' the three non-perfect tenses are faciō, faciam, faciēbam 'I do, I will do, I was doing', made with the ste…
Future Perfect | Department of Classics
classics.osu.edu › Tense › Perfect(The 3rd plural future of sum is erunt; but the 3rd plural personal ending for the future perfect is, as below, -erint .) This might help you grasp the concept of the future perfect in Latin: for it entails both a perfectness (the stem), and a futureness (of sum ). 1 st 2 nd 3 rd Singular - ero - eris - erit Plural - erimus - eritis - erint