Он уже смог доказать это своими опы

Он уже смог доказать это своими опытами.
Он сможет доказать своими опытами

Результаты (английский) 1:

He has already been able to prove it with their experiences.It can prove its experiences

Результаты (английский) 2:

He was able to prove that his experiments.
He will be able to prove their experiences

Результаты (английский) 3:

he was able to prove that their experimentation.he can prove his experimentation