<p><strong>Auxiliary Verb</strong></p><ul><li>(used to express duty or moral obligation): Every citizen ought to help.</li><li>(used to express justice, moral rightness, or the like): He ought to be punished. You ought to be ashamed.</li><li>(used to express propriety, appropriateness, etc.): You ought to be home early. We ought to bring her some flowers.</li><li>(used to express probability or natural consequence): That ought to be our train now.</li></ul>