I've thought it well over  "
( I ( 've ( ( ( thought it ) ( well over ) ) '' ) ) )
(ROOT (S (NP (PRP I)) (VP (VBP 've) (VP (VBN thought) (S (NP (PRP it))) (ADVP (RB well) (RB over)) ('' '')))))
I thought about it long and hard. 
( I ( ( ( thought ( about it ) ) ( ( long and ) hard ) ) . ) )
(ROOT (S (NP (PRP I)) (VP (VBD thought) (PP (IN about) (NP (PRP it))) (ADVP (RB long) (CC and) (RB hard))) (. .)))