I didn't do a lot of reading.
( I ( ( ( did n't ) ( do ( ( a lot ) ( of reading ) ) ) ) . ) )
(ROOT (S (NP (PRP I)) (VP (VBD did) (RB n't) (VP (VB do) (NP (NP (DT a) (NN lot)) (PP (IN of) (NP (NN reading)))))) (. .)))
I did not enjoy reading as a pastime. 
( I ( ( ( did not ) ( ( enjoy reading ) ( as ( a pastime ) ) ) ) . ) )
(ROOT (S (NP (PRP I)) (VP (VBD did) (RB not) (VP (VB enjoy) (NP (NN reading)) (PP (IN as) (NP (DT a) (NN pastime))))) (. .)))