There was a man who had four sons. Never did they stop quarrelling with one another.
我觉得 would 也是可以的,表示过去常常,不知道对不对。
would+动态动词,可以表示过去的习惯。与一般过去时表示的习惯相比较,前者用would含有预测意义。本句用did和would都是正确的。
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