Three more days went by in dreary inaction.
( ( Three ( more days ) ) ( ( went ( by ( in ( dreary inaction ) ) ) ) . ) )
(ROOT (S (NP (CD Three) (JJR more) (NNS days)) (VP (VBD went) (PP (IN by) (PP (IN in) (NP (JJ dreary) (NN inaction))))) (. .)))
The days passed by slowly.
( ( The days ) ( ( passed ( by slowly ) ) . ) )
(ROOT (S (NP (DT The) (NNS days)) (VP (VBD passed) (PP (IN by) (ADVP (RB slowly)))) (. .)))