The main tenses conjugated with 6 or 5 persons are: Modo indicativo: 8 tenses modo congiuntivo: 4 modo condizionale: 2 modo imperativo: 1 total: 15 then, as an appendix you have gerundio, participio and infinito (presente, passato) which will give you a total of only 6 verbal voices. When relativistic times (in accordance to Einstein's equations which showed to hold true) will enter common language we will surely need more tenses; you have been warned!

for andrew, could you make one sentence, but don't forget to use tense of Italian language, in your sentence, and i need your explanation...

far too many! :)