"She does not know anything about your family."

Translation: Elle ne sait rien de ta famille.

[katriniella]

Why isn't this "Elle ne sait pas rien sur ta famille"? Does the "rien" take the place of the "pas"?

[delapouite]

Yes : http://www.bertrandboutin.ca/Folder_151_Grammaire/O_a_la_negation.htm

[MWill22]

can sur be replaced with de here? ie she knows nothing of your family

[burramys]

Did you notice that if you use connaitre it is sur and if you used savoir it is de? Interesting. Perhaps it is just idiom - we need someone French to tell us!

[SimonOsbor]

MWill22 I thought the same