does n't really add up to much 
(ROOT (S (VP (VBZ does) (RB n't) (ADVP (RB really)) (VP (VB add) (PRT (RP up)) (PP (IN to) (NP (RB much)))))))
(ROOT (S (VP (VBZ ) (RB ) (ADVP (RB )) (VP (VB ) (PRT (RP )) (PP (IN ) (NP (RB )))))))