@ -672,6 +672,7 @@ class ToneSandhi:
and i + 1 < len(seg)
and seg[i - 1][0] == seg[i + 1][0]
and seg[i - 1][1] == "v"
and seg[i + 1][1] == "v"
):
new_seg[i - 1][0] = new_seg[i - 1][0] + "一" + new_seg[i - 1][0]
else: