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.