Shall we finish it off?
( ( Shall ( we ( ( finish it ) off ) ) ) ? )
(ROOT (SQ (VP (VB Shall) (S (NP (PRP we)) (VP (VB finish) (NP (PRP it)) (PRT (RP off))))) (. ?)))
Should we finish it all?
( Should ( we ( ( finish ( it all ) ) ? ) ) )
(ROOT (SQ (NNP Should) (NP (PRP we)) (VP (VB finish) (S (NP (PRP it)) (NP (DT all)))) (. ?)))