Past participle (e.g.: falado, dito, vindo, comido)

Questions about Past Participles

Q: Why is it Os meninos têm dito a verdade and NOT Os meninos têm ditos a verdade?
The past participle does not agree in gender or number when used with ter. Agreement only occurs when the participle is used as an adjective, not as part of a verb form.

Q: Why is it As cartas estão escritas em inglês and NOT As cartas estão escrito em inglês?
When the past participle is used with ser or estar as an adjective, it must agree in gender and number with the noun.

Q: Why is it tenho visto and NOT tenho vido?
The verb ver is irregular. Its past participle is visto, not vido. Irregular past participles need to be learned and memorized.