Portuguese conjugation explanation

Stem change: -o- → -u-

<p>For some of the verbs ending in <strong style="font-style: italic">-ir</strong>, if the last vowel in the stem is <span style="font-style: italic">o</span>, the <strong><span style="font-style: italic">o</span> changes to an <span style="font-style: italic">u</span></strong> in the first person singular form of the present tense. The spelling change happens in all verb forms derived from this verb form as well (present subjunctive and imperative tenses). </p>

<p>Common verbs affected by this spelling change are: <span style="font-style: italic"><strong>dormir, descobrir, cobrir, encobrir, engolir, demolir, abolir, tossir</strong></span>, etc.</p>

<p>In the following conjugation tables, the affected verb forms of <span style="font-style: italic">dormir</span> are highlighted:</p>

<div class="study_conjugations_tense_container">

<a class="study_conjugations_tense_label box_label" href="/study/tenseGuideForTense/1/" target="_blank" title="Open tense guide">Presente</a>

<div class="study_conjugations_conjugation conjugations_table two_columns">

<div class="study_conjugations_forms conjugation_forms highlighted_conjugation">

<div class="conjugation_form">

<span><span class="study_conjugations_pronoun conjugation_pronoun">

eu

</span><span class="irregular_conjugation" title="irregular conjugation">durmo<span class="irregularity_circle">&#9679;</span></span></span>

</div>

</div>

<div class="study_conjugations_forms conjugation_forms">

<div class="conjugation_form">

<span><span class="study_conjugations_pronoun conjugation_pronoun">

tu

</span>dormes

</span>

</div>

</div>

<div class="study_conjugations_forms conjugation_forms">

<div class="conjugation_form">

<span><span class="study_conjugations_pronoun conjugation_pronoun">

ele

</span>dorme

</span>

</div>

</div>

<div class="study_conjugations_forms conjugation_forms">

<div class="conjugation_form">

<span><span class="study_conjugations_pronoun conjugation_pronoun">

nós

</span>dormimos

</span>

</div>

</div>

<div class="study_conjugations_forms conjugation_forms">

<div class="conjugation_form">

<span><span class="study_conjugations_pronoun conjugation_pronoun">

vós

</span>dormis

</span>

</div>

</div>

<div class="study_conjugations_forms conjugation_forms">

<div class="conjugation_form">

<span><span class="study_conjugations_pronoun conjugation_pronoun">

eles

</span>dormem

</span>

</div>

</div>

</div>

</div>

<div class="study_conjugations_tense_container">

<a class="study_conjugations_tense_label box_label" href="/study/tenseGuideForTense/8/" target="_blank" title="Open tense guide">Presente do Subjuntivo</a>

<div class="study_conjugations_conjugation conjugations_table two_columns">

<div class="study_conjugations_forms conjugation_forms highlighted_conjugation">

<div class="conjugation_form">

<span><span class="study_conjugations_pronoun conjugation_pronoun">

que eu

</span><span class="irregular_conjugation" title="irregular conjugation">durma<span class="irregularity_circle">&#9679;</span></span></span>

</div>

</div>

<div class="study_conjugations_forms conjugation_forms highlighted_conjugation">

<div class="conjugation_form">

<span><span class="study_conjugations_pronoun conjugation_pronoun">

que tu

</span><span class="irregular_conjugation" title="irregular conjugation">durmas<span class="irregularity_circle">&#9679;</span></span></span>

</div>

</div>

<div class="study_conjugations_forms conjugation_forms highlighted_conjugation">

<div class="conjugation_form">

<span><span class="study_conjugations_pronoun conjugation_pronoun">

que ele

</span><span class="irregular_conjugation" title="irregular conjugation">durma<span class="irregularity_circle">&#9679;</span></span></span>

</div>

</div>

<div class="study_conjugations_forms conjugation_forms highlighted_conjugation">

<div class="conjugation_form">

<span><span class="study_conjugations_pronoun conjugation_pronoun">

que nós

</span><span class="irregular_conjugation" title="irregular conjugation">durmamos<span class="irregularity_circle">&#9679;</span></span></span>

</div>

</div>

<div class="study_conjugations_forms conjugation_forms highlighted_conjugation">

<div class="conjugation_form">

<span><span class="study_conjugations_pronoun conjugation_pronoun">

que vós

</span><span class="irregular_conjugation" title="irregular conjugation">durmais<span class="irregularity_circle">&#9679;</span></span></span>

</div>

</div>

<div class="study_conjugations_forms conjugation_forms highlighted_conjugation">

<div class="conjugation_form">

<span><span class="study_conjugations_pronoun conjugation_pronoun">

que eles

</span><span class="irregular_conjugation" title="irregular conjugation">durmam<span class="irregularity_circle">&#9679;</span></span></span>

</div>

</div>

</div>

</div>

<div class="study_conjugations_tense_container">

<a class="study_conjugations_tense_label box_label" href="/study/tenseGuideForTense/11/" target="_blank" title="Open tense guide">Imperativo Afirmativo</a>

<div class="study_conjugations_conjugation conjugations_table two_columns">

<div class="study_conjugations_forms conjugation_forms">

<div class="conjugation_form">

<span class="study_conjugations_pronoun conjugation_pronoun">---</span>

</div>

</div>

<div class="study_conjugations_forms conjugation_forms">

<div class="conjugation_form">

<span><span class="study_conjugations_pronoun conjugation_pronoun">

(tu)

</span>dorme

</span>

</div>

</div>

<div class="study_conjugations_forms conjugation_forms highlighted_conjugation">

<div class="conjugation_form">

<span><span class="study_conjugations_pronoun conjugation_pronoun">

(você)

</span><span class="irregular_conjugation" title="irregular conjugation">durma<span class="irregularity_circle">&#9679;</span></span></span>

</div>

</div>

<div class="study_conjugations_forms conjugation_forms highlighted_conjugation">

<div class="conjugation_form">

<span><span class="study_conjugations_pronoun conjugation_pronoun">

(nós)

</span><span class="irregular_conjugation" title="irregular conjugation">durmamos<span class="irregularity_circle">&#9679;</span></span></span>

</div>

</div>

<div class="study_conjugations_forms conjugation_forms">

<div class="conjugation_form">

<span><span class="study_conjugations_pronoun conjugation_pronoun">

(vós)

</span>dormi

</span>

</div>

</div>

<div class="study_conjugations_forms conjugation_forms highlighted_conjugation">

<div class="conjugation_form">

<span><span class="study_conjugations_pronoun conjugation_pronoun">

(vocês)

</span><span class="irregular_conjugation" title="irregular conjugation">durmam<span class="irregularity_circle">&#9679;</span></span></span>

</div>

</div>

</div>

</div>

<div class="conjugation_explanation_title">Exceptions</div>

<ul>

<li>

Irregular verbs

</li>

<ul>

<li>

<span style="font-style: italic">sorrir</span> (conjugated like <span style="font-style: italic">rir</span>)

<div class="study_conjugations_tense_container">

<a class="study_conjugations_tense_label box_label" href="/study/tenseGuideForTense/1/" target="_blank" title="Open tense guide">Presente</a>

<div class="study_conjugations_conjugation conjugations_table two_columns">

<div class="study_conjugations_forms conjugation_forms">

<div class="conjugation_form">

<span><span class="study_conjugations_pronoun conjugation_pronoun">

eu

</span><span class="irregular_conjugation" title="irregular conjugation">sorrio<span class="irregularity_circle">&#9679;</span></span></span>

</div>

</div>

<div class="study_conjugations_forms conjugation_forms">

<div class="conjugation_form">

<span><span class="study_conjugations_pronoun conjugation_pronoun">

tu

</span><span class="irregular_conjugation" title="irregular conjugation">sorris<span class="irregularity_circle">&#9679;</span></span></span>

</div>

</div>

<div class="study_conjugations_forms conjugation_forms">

<div class="conjugation_form">

<span><span class="study_conjugations_pronoun conjugation_pronoun">

ele

</span><span class="irregular_conjugation" title="irregular conjugation">sorri<span class="irregularity_circle">&#9679;</span></span></span>

</div>

</div>

<div class="study_conjugations_forms conjugation_forms">

<div class="conjugation_form">

<span><span class="study_conjugations_pronoun conjugation_pronoun">

nós

</span>sorrimos

</span>

</div>

</div>

<div class="study_conjugations_forms conjugation_forms">

<div class="conjugation_form">

<span><span class="study_conjugations_pronoun conjugation_pronoun">

vós

</span><span class="irregular_conjugation" title="irregular conjugation">sorrides<span class="irregularity_circle">&#9679;</span></span></span>

</div>

</div>

<div class="study_conjugations_forms conjugation_forms">

<div class="conjugation_form">

<span><span class="study_conjugations_pronoun conjugation_pronoun">

eles

</span><span class="irregular_conjugation" title="irregular conjugation">sorriem<span class="irregularity_circle">&#9679;</span></span></span>

</div>

</div>

</div>

</div>

</li>

<li>

<span style="font-style: italic">convir, provir</span> (conjugated like <span style="font-style: italic">vir</span>)</span>

<div class="study_conjugations_tense_container">

<a class="study_conjugations_tense_label box_label" href="/study/tenseGuideForTense/1/" target="_blank" title="Open tense guide">Presente</a>

<div class="study_conjugations_conjugation conjugations_table two_columns">

<div class="study_conjugations_forms conjugation_forms">

<div class="conjugation_form">

<span><span class="study_conjugations_pronoun conjugation_pronoun">

eu

</span><span class="irregular_conjugation" title="irregular conjugation">convenho<span class="irregularity_circle">&#9679;</span></span></span>

</div>

</div>

<div class="study_conjugations_forms conjugation_forms">

<div class="conjugation_form">

<span><span class="study_conjugations_pronoun conjugation_pronoun">

tu

</span><span class="irregular_conjugation" title="irregular conjugation">convéns<span class="irregularity_circle">&#9679;</span></span></span>

</div>

</div>

<div class="study_conjugations_forms conjugation_forms">

<div class="conjugation_form">

<span><span class="study_conjugations_pronoun conjugation_pronoun">

ele

</span><span class="irregular_conjugation" title="irregular conjugation">convém<span class="irregularity_circle">&#9679;</span></span></span>

</div>

</div>

<div class="study_conjugations_forms conjugation_forms">

<div class="conjugation_form">

<span><span class="study_conjugations_pronoun conjugation_pronoun">

nós

</span>convimos

</span>

</div>

</div>

<div class="study_conjugations_forms conjugation_forms">

<div class="conjugation_form">

<span><span class="study_conjugations_pronoun conjugation_pronoun">

vós

</span><span class="irregular_conjugation" title="irregular conjugation">convindes<span class="irregularity_circle">&#9679;</span></span></span>

</div>

</div>

<div class="study_conjugations_forms conjugation_forms">

<div class="conjugation_form">

<span><span class="study_conjugations_pronoun conjugation_pronoun">

eles

</span><span class="irregular_conjugation" title="irregular conjugation">convêm<span class="irregularity_circle">&#9679;</span></span></span>

</div>

</div>

</div>

</div>

</li>

</ul>

<li>

Regular verbs: <span style="font-style: italic">colorir, eclodir, erodir</span>

<div class="study_conjugations_tense_container">

<a class="study_conjugations_tense_label box_label" href="/study/tenseGuideForTense/1/" target="_blank" title="Open tense guide">Presente</a>

<div class="study_conjugations_conjugation conjugations_table two_columns">

<div class="study_conjugations_forms conjugation_forms">

<div class="conjugation_form">

<span class="study_conjugations_pronoun conjugation_pronoun">---</span>

</div>

</div>

<div class="study_conjugations_forms conjugation_forms">

<div class="conjugation_form">

<span class="study_conjugations_pronoun conjugation_pronoun">---</span>

</div>

</div>

<div class="study_conjugations_forms conjugation_forms">

<div class="conjugation_form">

<span class="study_conjugations_pronoun conjugation_pronoun">---</span>

</div>

</div>

<div class="study_conjugations_forms conjugation_forms">

<div class="conjugation_form">

<span><span class="study_conjugations_pronoun conjugation_pronoun">

nós

</span>colorimos

</span>

</div>

</div>

<div class="study_conjugations_forms conjugation_forms">

<div class="conjugation_form">

<span><span class="study_conjugations_pronoun conjugation_pronoun">

vós

</span>coloris

</span>

</div>

</div>

<div class="study_conjugations_forms conjugation_forms">

<div class="conjugation_form">

<span class="study_conjugations_pronoun conjugation_pronoun">---</span>

</div>

</div>

</div>

</div>

</li>

</ul>