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