There's only one thing for me to do."
( There ( ( ( 's ( ( ( only ( one thing ) ) ( for me ) ) ( to do ) ) ) . ) '' ) )
(ROOT (S (NP (EX There)) (VP (VBZ 's) (NP (NP (RB only) (CD one) (NN thing)) (PP (IN for) (NP (PRP me))) (S (VP (TO to) (VP (VB do)))))) (. .) ('' '')))
I only have one thing left to do.
( I ( only ( ( have ( ( one thing ) ( left ( to do ) ) ) ) . ) ) )
(ROOT (S (NP (PRP I)) (ADVP (RB only)) (VP (VBP have) (NP (NP (CD one) (NN thing)) (VP (VBN left) (S (VP (TO to) (VP (VB do))))))) (. .)))