Verbi express a physical or mental action or state, or declare/ assert / irregular verb tables vs regular verb models/ in sentence structure~~adverbs etc./ conjugation of all verbs / ordered by type (modal/aux/irreg/reg), by function (action/working etc), alphabetically, by ending (are/ere/ire/iscono)/ also graphical site map here.

Verb types
Auxilliary.....Avere Essere
Impersonal verbs
Reflexive verbs
Modal verbs
passive verbs

transitive verbs : take a diretc object (i saw her/ they ate pasta/ he wrote a letter). Transitive verbs not always used with a d.o....(they ate quickly/ he wrote to her), but if they can be , the verb is defined as transitive.

intransitive verbs: Verbs which can never be used with a D.o. (Mary arrived late/ i lay down)

Passive verbs (only transitive verbs are used in the passive)