let 's get this thing over with 
(ROOT (S (VP (VB let) (S (NP (PRP 's)) (VP (VB get) (NP (DT this) (NN thing)) (ADVP (RP over) (PP (IN with))))))))
(ROOT (S (VP (VB ) (S (NP (PRP )) (VP (VB ) (NP (DT ) (NN )) (ADVP (RP ) (PP (IN ))))))))