Did you go door to door?
( ( ( Did you ) ( go ( door ( to door ) ) ) ) ? )
(ROOT (SQ (VBD Did) (NP (PRP you)) (VP (VB go) (ADVP (NN door) (TO to) (NN door))) (. ?)))
Was it the case that you went door to door?
( ( ( ( Was it ) ( the case ) ) ( that ( you ( went ( door ( to door ) ) ) ) ) ) ? )
(ROOT (SQ (VBD Was) (NP (PRP it)) (NP (DT the) (NN case)) (SBAR (IN that) (S (NP (PRP you)) (VP (VBD went) (ADVP (NN door) (TO to) (NN door))))) (. ?)))