Did you write this?
( ( ( Did you ) ( write this ) ) ? )
(ROOT (SQ (VBD Did) (NP (PRP you)) (VP (VB write) (NP (DT this))) (. ?)))
Why did you destroy this?
( Why ( ( ( did you ) ( destroy this ) ) ? ) )
(ROOT (SBARQ (WHADVP (WRB Why)) (SQ (VBD did) (NP (PRP you)) (VP (VB destroy) (NP (DT this)))) (. ?)))