Thank you for your past help and your continued support.
( ( ( Thank you ) ( for ( ( ( your ( past help ) ) and ) ( your ( continued support ) ) ) ) ) . )
(ROOT (S (VP (VB Thank) (NP (PRP you)) (PP (IN for) (NP (NP (PRP$ your) (JJ past) (NN help)) (CC and) (NP (PRP$ your) (VBN continued) (NN support))))) (. .)))
They did not thank them for their help or support.
( They ( ( ( did not ) ( ( thank them ) ( for ( their ( ( help or ) support ) ) ) ) ) . ) )
(ROOT (S (NP (PRP They)) (VP (VBD did) (RB not) (VP (VB thank) (NP (PRP them)) (PP (IN for) (NP (PRP$ their) (NN help) (CC or) (NN support))))) (. .)))