<p>Reflexive verbs always use <span style="font-style: italic;">essere</span> as an auxiliary verb:</p>
<div class="conjugation_explanation_example_sentence">Il gatto <strong>si è arrampicato</strong> sull'albero. (<span style="font-style: italic;">The cat climbed up the tree.</span>)</div>
<div class="conjugation_explanation_example_sentence">Io <strong>mi sono incontrato</strong> con lui oggi. (<span style="font-style: italic;">I met with him today.</span>)</div>
<div class="conjugation_explanation_example_sentence"><strong>Vi siete scordati</strong> di spegnere la luce. (<span style="font-style: italic;">You forgot to turn off the light.</span>)</div>
Italian conjugation explanation