I cannot overemphasize the importance of your support.
( I ( ( ( can not ) ( overemphasize ( ( the importance ) ( of ( your support ) ) ) ) ) . ) )
(ROOT (S (NP (PRP I)) (VP (MD can) (RB not) (VP (VB overemphasize) (NP (NP (DT the) (NN importance)) (PP (IN of) (NP (PRP$ your) (NN support)))))) (. .)))
Your support is exceedingly important and cannot be exaggerated.
( ( Your support ) ( ( ( ( is ( exceedingly important ) ) and ) ( ( can not ) ( be exaggerated ) ) ) . ) )
(ROOT (S (NP (PRP$ Your) (NN support)) (VP (VP (VBZ is) (ADJP (RB exceedingly) (JJ important))) (CC and) (VP (MD can) (RB not) (VP (VB be) (ADJP (JJ exaggerated))))) (. .)))