Note when speaking in the present perfect or past we use either the auxiliary verb have or essere in the present plus the past participle of the main verb. When using the auxiliary have the past participle does not change e for example Lei ha scritto una lettera d'amore, however when using the auxiliary verb essere where the main verb is a movement verb , reflexive or verb of change ( nacere , morire, diventare) the past participle changes in gender and number for example Lei e' andato a cavallo or Lei e' andata a cavallo, lei si e' innamorata, lui si e' innamorato Try writing them out correctly remembering the rules, ciao a presto!