In older forms of Neapolitan, infinitives, gerunds, and participles could be inflected. The infinitive examples below show "-vo, -mo, and -no can be attached to infinitive forms, but the meaning is unclear. Many scholars are unsure of the exact meaning of these forms, but have agreed upon the rough approximations provided below.

Levare + -mo "we + to get up"

Essere + -ve "you+to be"

(H)avere + -no "He/she +to have"

On account of the lack of study of Neapolitan as a whole, there are still some aspects of the language which are unclear to nonnative speakers. The interpretation of these forms is one of these examples especially because it is often confused with an early condition form in Neapolitan that was derived from the Latin pluperfect, functioning as follows:

amaveramus (latin) - we had loved

amàremo (neapolitan) - we would love