I want you to mark him.
( I ( ( want ( you ( to ( mark him ) ) ) ) . ) )
(ROOT (S (NP (PRP I)) (VP (VBP want) (S (NP (PRP you)) (VP (TO to) (VP (VB mark) (NP (PRP him)))))) (. .)))
He should be marked.
( He ( ( should ( be marked ) ) . ) )
(ROOT (S (NP (PRP He)) (VP (MD should) (VP (VB be) (VP (VBN marked)))) (. .)))