would have succeeded
Si hubiera trabajado duro en aquel tiempo, habría tenido éxito.
If I had worked hard back then, I would have succeeded.
Tom seguramente no habría tenido éxito sin tu ayuda.
Tom probably wouldn’t have succeeded without your help.
He would have succeeded.
Si yo hubiera hecho lo mejor que pudiera, tal vez habría tenido éxito.
If I had done my best, perhaps I would have succeeded.