darned if your toes wo n't still be tapping 
(ROOT (VP (VBN darned) (SBAR (IN if) (S (NP (PRP$ your) (NNS toes)) (VP (MD wo) (RB n't) (ADVP (RB still)) (VP (VB be) (VP (VBG tapping))))))))
(ROOT (VP (VBN ) (SBAR (IN ) (S (NP (PRP$ ) (NNS )) (VP (MD ) (RB ) (ADVP (RB )) (VP (VB ) (VP (VBG ))))))))