Compléter Verbos modalesVersion en ligne Juega par Karen Coronel 1 verb possibility verb necessary modality auxiliary English because Spanish ability obligation there permission A modal is an verb ( that is , dependent on another ) that is used to indicate what is called " " : , possibility , or . In English , these verbs are the tenses are not enough to express ideas as uncertainty or : is no tense like the subjunctive , for example .