I still read history.
( I ( still ( ( read history ) . ) ) )
(ROOT (S (NP (PRP I)) (ADVP (RB still)) (VP (VBP read) (NP (NN history))) (. .)))
I still read history books every month.
( I ( still ( ( ( read ( history books ) ) ( every month ) ) . ) ) )
(ROOT (S (NP (PRP I)) (ADVP (RB still)) (VP (VBD read) (NP (NN history) (NNS books)) (NP (DT every) (NN month))) (. .)))