if it had just gone that one step further 
(ROOT (SBAR (IN if) (S (NP (PRP it)) (VP (VBD had) (ADVP (RB just)) (VP (VBN gone) (ADVP (NP (DT that) (CD one) (NN step)) (RBR further)))))))
(ROOT (SBAR (IN ) (S (NP (PRP )) (VP (VBD ) (ADVP (RB )) (VP (VBN ) (ADVP (NP (DT ) (CD ) (NN )) (RBR )))))))