Um, but he'd bend down and stay down to help that dog.
( Um ( , ( but ( ( he ( 'd ( ( ( bend down ) and ) ( ( stay down ) ( to ( help ( that dog ) ) ) ) ) ) ) . ) ) ) )
(ROOT (FRAG (NP (NNP Um)) (, ,) (CC but) (S (NP (PRP he)) (VP (MD 'd) (VP (VP (VB bend) (PRT (RP down))) (CC and) (VP (VB stay) (PRT (RP down)) (S (VP (TO to) (VP (VB help) (NP (DT that) (NN dog))))))))) (. .)))
The dog needed help so he bent down.
( ( The dog ) ( ( needed ( help ( so ( he ( bent down ) ) ) ) ) . ) )
(ROOT (S (NP (DT The) (NN dog)) (VP (VBD needed) (VP (VB help) (SBAR (IN so) (S (NP (PRP he)) (VP (VBZ bent) (PRT (RP down))))))) (. .)))