You would really have At the halt then had ?
(ROOT_0 (S_0 (ATS_3 (NP_1 (PRP_0 You)) (VP_4 (ATVP_1 (MD_0 would) (ADVP_0 (RB_0 really))) (VP_5 (ATVP_1 (VBP_0 have) (PP_2 (IN_0 At) (NP_5 (DT_0 the) (NN_2 halt)))) (VP_1 (ADVP_0 (RB_0 then)) (VBD_1 had))))) (DOT_0 ?)))