He detected grammatical niceties in Latin, in regard to the consecution of tenses which had escaped preceding critics.
Compound tenses are formed by the addition of certain particles and of the auxiliary verbs - a a y e, to have, a fi, to be, and a voi, to will.
In the past and present " tenses " the perfect and imperfect participles are used.
Another special feature of CastilianPortuguese is the complete absence of the form of conjugation known as inchoative (intercalation, in the present tense, of the syllable isc or esc between the radical and the inflexion), although in all the other tenses, except the present, Spanish shows a tendency to lay the accent upon the same syllable in all the six persons, which was the object aimed at by the inchoative form.
This dictionary contains 766 Spanish verbs, with all major regular and irregular verb conjugations in 13 tenses and moods.