Let's get it right.
( ( Let 's ) ( ( get ( it right ) ) . ) )
(ROOT (S (NP (NNP Let) (POS 's)) (VP (VBP get) (S (NP (PRP it)) (ADJP (RB right)))) (. .)))
Let's screw this up.
( ( Let 's ) ( ( ( screw this ) up ) . ) )
(ROOT (S (NP (NNP Let) (POS 's)) (VP (VBD screw) (NP (DT this)) (PRT (RP up))) (. .)))