The sooner we strike the better." He turned to Tuppence.
( ( ( The sooner ) ( we ( ( ( strike ( the better ) ) . ) '' ) ) ) ( He ( ( turned ( to Tuppence ) ) . ) ) )
(ROOT (S (SBAR (X (DT The) (RB sooner)) (S (NP (PRP we)) (VP (VBP strike) (NP (DT the) (JJR better))) (. .) ('' ''))) (NP (PRP He)) (VP (VBD turned) (PP (TO to) (NP (NNP Tuppence)))) (. .)))
He convinced Tuppence to hold off on their action plan. 
( He ( ( convinced ( Tuppence ( to ( ( hold off ) ( on ( their ( action plan ) ) ) ) ) ) ) . ) )
(ROOT (S (NP (PRP He)) (VP (JJ convinced) (S (NP (NNP Tuppence)) (VP (TO to) (VP (VB hold) (PRT (RP off)) (PP (IN on) (NP (PRP$ their) (NN action) (NN plan))))))) (. .)))