Are you sure?
( ( ( Are you ) sure ) ? )
(ROOT (SQ (VBP Are) (NP (PRP you)) (ADJP (VBG sure)) (. ?)))
Have you thought it through?
( ( ( Have you ) ( thought ( it through ) ) ) ? )
(ROOT (SQ (VBP Have) (NP (PRP you)) (VP (VBN thought) (S (NP (PRP it)) (ADVP (RB through)))) (. ?)))