His vigorous strides soon enabled him to gain upon them, and by the time he, in his turn, reached the corner the distance between them was sensibly lessened.
( ( His ( vigorous strides ) ) ( soon ( ( enabled ( him ( to ( gain ( ( ( ( upon them ) , ) and ) ( by ( ( the time ) ( he ( , ( ( in ( his turn ) ) ( , ( reached ( ( the corner ) ( ( ( the distance ) ( between them ) ) ( was ( sensibly lessened ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) . ) ) )
(ROOT (S (NP (PRP$ His) (JJ vigorous) (NNS strides)) (ADVP (RB soon)) (VP (VBD enabled) (S (NP (PRP him)) (VP (TO to) (VP (VB gain) (PP (PP (IN upon) (NP (PRP them))) (, ,) (CC and) (PP (IN by) (NP (NP (DT the) (NN time)) (SBAR (S (NP (PRP he)) (, ,) (PP (IN in) (NP (PRP$ his) (NN turn))) (, ,) (VP (VBD reached) (NP (NP (DT the) (NN corner)) (SBAR (S (NP (NP (DT the) (NN distance)) (PP (IN between) (NP (PRP them)))) (VP (VBD was) (ADJP (RB sensibly) (JJ lessened)))))))))))))))) (. .)))
His short, feeble strides soon left him trailing far behind.
( ( His ( short ( , ( feeble strides ) ) ) ) ( soon ( ( left ( him ( trailing ( far behind ) ) ) ) . ) ) )
(ROOT (S (NP (PRP$ His) (JJ short) (, ,) (JJ feeble) (NNS strides)) (ADVP (RB soon)) (VP (VBD left) (S (NP (PRP him)) (VP (VBG trailing) (ADVP (RB far) (RB behind))))) (. .)))