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)))))) (. .)))
As your support cannot be exaggerated, I would like to invite you to lunch.
( ( As ( ( your support ) ( ( can not ) ( be exaggerated ) ) ) ) ( , ( I ( ( would ( like ( to ( ( invite you ) ( to lunch ) ) ) ) ) . ) ) ) )
(ROOT (S (SBAR (IN As) (S (NP (PRP$ your) (NN support)) (VP (MD can) (RB not) (VP (VB be) (ADJP (JJ exaggerated)))))) (, ,) (NP (PRP I)) (VP (MD would) (VP (VB like) (S (VP (TO to) (VP (VB invite) (NP (PRP you)) (PP (TO to) (NP (NN lunch)))))))) (. .)))