149 表示无义务的各种形式

但是，关于needn't在间接引语中的用法，参见上面第148节C。

shan't／won't need to=shan't／won't have to

don't／doesn't need to=don't／doesn't have to

didn't need to= didn't have to（但 didn't have to更常见）

从上面的表格中可以看出，与haven't／hasn't got to和 hadn't got to完全同义的 need的形式是不存在的。