static SS ai_negateVerbPhrase_map = litcimap(
  "am", "am not",
  "are", "are not",
  "is", "is not",
  "has", "doesn't have",
  "have", "don't have",
);

static S ai_negateVerbPhrase(S s) {
  try answer ai_negateVerbPhrase_map.get(s);
  ret isThirdPersonVerb(s) ? "doesn't " + s : "don't " + s;
}