You have to walk through it).
( You ( ( have ( to ( ( ( walk through ) it ) -RRB- ) ) ) . ) )
(ROOT (S (NP (PRP You)) (VP (VBP have) (S (VP (TO to) (VP (VB walk) (ADVP (RB through)) (NP (PRP it)) (-RRB- -RRB-))))) (. .)))
You need to pass through it on foot.
( You ( ( need ( to ( ( pass ( through it ) ) ( on foot ) ) ) ) . ) )
(ROOT (S (NP (PRP You)) (VP (VBP need) (S (VP (TO to) (VP (VB pass) (PP (IN through) (NP (PRP it))) (PP (IN on) (NP (NN foot))))))) (. .)))