tell him the truth
Non sarebbe meglio dirgli la verità?
Wouldn't it be better to tell him the truth?
— Les choristes - I ragazzi del coro (2004)
Hai fatto bene a dirgli la verità anche se era difficile.
You did the right thing by telling him the truth even though it was difficult.
You have to tell him the truth.
Ho deciso di dirgli la verità.
I decided to tell him the truth.
Faresti bene a dirgli la verità.
You'd better tell him the truth.
You should tell him the truth.