works more often than it does n't . 
(ROOT (S (VP (VBZ works) (ADVP (ADVP (RBR more) (RB often)) (SBAR (IN than) (S (NP (PRP it)) (VP (VBZ does) (RB n't)))))) (. .)))
(ROOT (S (VP (VBZ ) (ADVP (ADVP (RBR ) (RB )) (SBAR (IN ) (S (NP (PRP )) (VP (VBZ ) (RB )))))) (. )))