Your contribution to Goodwill will mean more than you may know.
( ( ( Your contribution ) ( to Goodwill ) ) ( ( will ( mean ( more ( than ( you ( may know ) ) ) ) ) ) . ) )
(ROOT (S (NP (NP (PRP$ Your) (NN contribution)) (PP (TO to) (NP (NNP Goodwill)))) (VP (MD will) (VP (VB mean) (ADVP (ADVP (RBR more)) (SBAR (IN than) (S (NP (PRP you)) (VP (MD may) (VP (VB know)))))))) (. .)))
Your contribution to Goodwill will mean more than you will ever be able to measure. 
( ( ( Your contribution ) ( to Goodwill ) ) ( ( will ( mean ( more ( than ( you ( ( will ever ) ( be ( able ( to measure ) ) ) ) ) ) ) ) ) . ) )
(ROOT (S (NP (NP (PRP$ Your) (NN contribution)) (PP (TO to) (NP (NNP Goodwill)))) (VP (MD will) (VP (VB mean) (ADVP (ADVP (RBR more)) (SBAR (IN than) (S (NP (PRP you)) (VP (MD will) (ADVP (RB ever)) (VP (VB be) (ADJP (JJ able) (S (VP (TO to) (VP (VB measure)))))))))))) (. .)))