Hi there! I came across this phrase in the dictionary and have read as many definitions as I could but the examples the dictionaries provide doesn't still make sense to me. That will teach you (to do something) For example: that will teach you to be late. to me it made sense if it was ; that will teach you not to be late. I understand it's a fixed phrase, but I really need help in understanding it. Is it sarcastic or ironical ? I appreciate your help :-)