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.