didn't know that/what
Non sapeva che la gente muore nel Buco?
Didn't you know that people die in the Hole?
— Il buco (2019)
Tom non sapeva che stavi scherzando.
Tom didn't know you were joking.
He didn't know what to do.
Non sapeva che Shakespeare avesse scritto Romeo e Giulietta.
He/She didn't know that Shakespeare had written Romeo and Juliet.
Tom non sapeva che stavate scherzando.
Tom didn’t know that you were joking.
Tom non sapeva che Mary fosse così divertente.
Tom didn’t know that Mary was so funny.
Non sapeva che Mary abitava da sola?
Didn't he know that Mary lived alone?
Tom non sapeva che Mary fosse sposata.
Tom didn't know that Mary was married.
Non sapeva che la sua porta era aperta?
Didn't he know that his door was open?
Non sapeva che Tom e Mary stavano per farlo?
Didn't he or she know that Tom and Mary were about to do it?