The verbs of the third group are irregular verbs. Most of the verbs of the third group have the same endings when conjugated into the future simple. There are however some verbs that change completely when conjugated into the future simple. There are other verbs that follow the same pattern. Let’s start with the verbs which have “voir” as a root.
The verbs ending with the root “voir” don’t conjugate the same.
The verbs with the root “voir” that conjugate like the verb “voir” - to see: entrevoir -
revoir