He seemed to have aged a thousand years.
( He ( ( seemed ( to ( have ( aged ( a ( thousand years ) ) ) ) ) ) . ) )
(ROOT (S (NP (PRP He)) (VP (VBD seemed) (S (VP (TO to) (VP (VB have) (VP (VBN aged) (NP (DT a) (CD thousand) (NNS years))))))) (. .)))
He had aged due to stress.
( He ( ( had ( aged ( due ( to stress ) ) ) ) . ) )
(ROOT (S (NP (PRP He)) (VP (VBD had) (VP (VBN aged) (ADJP (JJ due) (S (VP (TO to) (VP (VB stress))))))) (. .)))