Is this a mistake?
In Orberg LLPSI Exercitium 8 of Cap XXXIX he has:
'Filius et nopos Anchisae suadent ne omnes suos secum perd_.'
The idea is to provide the correct subjunctive after 'ut' or 'ne'. His answer is:
'Filius et nepos Anchisae suadent ne omnes suos secum perderet.'
But this is surely wrong as suadent is present and so the subjunctive should be present also...giving us suadeant?