He caught his breath.
( He ( ( caught ( his breath ) ) . ) )
(ROOT (S (NP (PRP He)) (VP (VBD caught) (NP (PRP$ his) (NN breath))) (. .)))
His breath would not come.
( ( His breath ) ( ( ( would not ) come ) . ) )
(ROOT (S (NP (PRP$ His) (NN breath)) (VP (MD would) (RB not) (VP (VB come))) (. .)))