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))))) (. .)))
Nothing major happened for three days.
( ( Nothing major ) ( ( happened ( for ( three days ) ) ) . ) )
(ROOT (S (NP (NN Nothing) (JJ major)) (VP (VBD happened) (PP (IN for) (NP (CD three) (NNS days)))) (. .)))