Come in, please! 
( ( Come in ) ( , ( please ! ) ) )
(ROOT (S (PP (VBN Come) (PP (IN in))) (, ,) (VP (VB please)) (. !)))
I would like you to visit me here. 
( I ( ( would ( like ( you ( to ( ( visit me ) here ) ) ) ) ) . ) )
(ROOT (S (NP (PRP I)) (VP (MD would) (VP (VB like) (S (NP (PRP you)) (VP (TO to) (VP (VB visit) (NP (PRP me)) (ADVP (RB here))))))) (. .)))