Final answer:
The conjugation of the Spanish verb 'Volver' in the subjunctive form for 'ellos' is 'Vuelvan'. It's used to express various states of unreal situations including doubt, uncertainty, or actions not yet done.
Step-by-step explanation:
The verb 'Volver' in the subjunctive form for 'ellos' (they) is 'Vuelvan'. In the subjunctive mood, we use this form to express various states of unreality such as doubt, necessity, possibility, or action that has not yet occurred. Here's a simple sentence as an example to understand its usage better: 'Es necesario que ellos vuelvan a casa temprano' which means 'It's necessary that they return home early.'
Learn more about Volver Subjunctive Conjugation