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  1) should和ought to表示责任、建议或劝告,翻译为"应该",后者语气强一些。
  【例如】
  You should listen to the doctor’s advice if you want to recover soon.
  Such things ought not to be allowed.
  2) should接动词的完成式,是一种谴责,表示过去应该做而没有做或过去做了而不应该做。
  【例如】
  I missed the class. I should have come earlier.
  I shouldn’t have made such a foolish mistake.

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