He switched 'adeptly' between English and Italian.
She's 'adept at' fixing flaws in the system.
He was 'adept at' (using) computers.
(..) For years, the humanity has been talking about Christ's execution. Gentlemen, let's not make wrong comparisons, please. Mr Captain Cervenko is an adept of non-violence. In the attack he takes a stick. Does not carry a weapon. Ties himself up so as not to kill anyone. Tolstoi, if i am not wrong... (..)1965 Forest of the Hanged