Verbos Modais, or Modal Verbs, in Portuguese grammar are special types of verbs used to express possibility, necessity, obligation or permission. These verbs, such as “poder” (can), “dever” (must), “precisar” (need) and “querer” (want), are often used in combination with other verbs in a sentence to convey their meaning. Learning to use these modal verbs properly is an essential skill for achieving fluency in Portuguese.