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