The past participle of the infinitive caer is

Las calles estén sucias. es recomendable que es una vergüenza que es preferible que es preciso que

When could you attach the direct object pronoun to an infinitive verb? a: when an infinitive verb follows a conjugated verb. b: when an infinitive verb ends in a question. c: when a stem-changing verb ends in a question. d: when a stem-changing verb follows a conjugated verb.

Francisco oller was one of the first latin american artists to depict the carribean enviroment in a( style