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 it´s auxiliaries are have and has 2 it is talking about experiences 3 past participle of theverb 4 it is used to talk about an action that has already ended 5 it´s assistant is did present perfect simple past simple assistant Present perfect simple auxiliaries past simple Present perfect simple verb