Auxiliary Verb ChallengeVersion en ligne Test your knowledge of auxiliary verbs with this fun alphabet quiz! par Abner Jácome A B C D E H M S Empieza por A The first-person singular present form of 'to be', used to indicate a current state or action. Empieza por B The base form of 'to be', used to indicate existence or identity. Empieza por C A modal auxiliary used to express ability or possibility. Empieza por D An auxiliary used to form questions and negatives in the present simple tense. Empieza por E Describes a state of enthusiasm or readiness, often used with auxiliary verbs to express desire. Empieza por H An auxiliary used to form perfect tenses, indicating completed actions. Empieza por M A modal auxiliary used to express a lower possibility or suggestion. Empieza por S A modal auxiliary used to indicate obligation or recommendation.