<span class="searchmatch">autentificabas</span> second-person singular imperfect indicative of autentificar...
<span class="searchmatch">autentificaba</span> first/third-person singular imperfect indicative of autentificar...
autentifica autentificamos autentificáis autentifican imperfect <span class="searchmatch">autentificaba</span> <span class="searchmatch">autentificabas</span> <span class="searchmatch">autentificaba</span> autentificábamos autentificabais autentificaban preterite...