about, on
Papà mi aveva messa in guardia sugli abusi di quella regola.
Dad had warned me about the abuse of that rule.
Ha molto da imparare sugli affari.
He has a lot to learn about business.
Avete molto da imparare sugli affari.
You have a lot to learn about business.
Noi dobbiamo indagare sugli abusi sociali.
We must investigate social abuses.