NEITHER ... NOR
E/THER ... OR
These expressions connect nouns, verbs and other sorts of expression.
1. Both...and is used to express similarity or likeness. It gives a positive meaning.
2. Neither.. nor is used to express dissimilarity or unlikeness. It gives a negative meaning
3. Either...or is used to talk about a choice between two possibilities.
*** I know both English and French. (+)
*** I know neither English nor French. (-)
*** He knows either English or French. (I'm not sure.)
*** Jane can neither speak nor hear .
*** You must either feed this camel or go home.
*** Both his brother and sister are attending a high school.