Final answer:
The ellos form of the verb deber in the present tense is Deben.
Step-by-step explanation:
The ellos form of the verb deber in the present tense is Deben. The verb deber means 'to owe' or 'to must' in English. Here's an example sentence: 'Ellos deben terminar la tarea hoy' which translates to 'They must finish the homework today'.
Learn more about Spanish verb conjugation