Relacionar Columnas characteristics of two topicVersión en línea define which characteristics belong to the past simple or the present perfect simple por Silvia Pedraza 1 past participle of theverb 2 it is talking about experiences 3 it´s assistant is did 4 it´s auxiliaries are have and has 5 it is used to talk about an action that has already ended past simple present perfect simple past simple assistant Present perfect simple verb Present perfect simple auxiliaries