<p>The past participle form of the verb <span style="font-style: italic;">werden</span> can be either <span style="font-style: italic;">worden</span> or <span style="font-style: italic;">geworden</span> depending on the role of the verb. The forms are <strong>not interchangeable</strong>:</p>
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<div><strong>WORDEN:</strong> when it's used as an auxiliary verb (passive voice):</div>
<div class="conjugation_explanation_example_sentence">Ich bin fast von einem LKW überfahren <span class="green_emphasis">worden</span>. (<span style="font-style: italic;">I was nearly run over by a truck.</span>)</div>
<div class="conjugation_explanation_example_sentence">Die Versammlung ist für nächste Woche anberaumt <span class="green_emphasis">worden</span>. (<span style="font-style: italic;">The meeting has been fixed for next week.</span>)</div>
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<div><strong>GEWORDEN:</strong> when it's used in a non-auxiliary role (e.g., to become):</div>
<div class="conjugation_explanation_example_sentence">Sein Haar ist silber <span class="green_emphasis">geworden</span>. (<span style="font-style: italic;">His hair has turned silver.</span>)</div>
<div class="conjugation_explanation_example_sentence">Die Fakten sind allen bekannt <span class="green_emphasis">geworden</span>. (<span style="font-style: italic;">The facts became known to everyone.</span>)</div>
German conjugation explanation