***** NOT A TEACHER *****
"As a rule" means "usually."
For example: "I do not go to the movies [the cinema], as a rule. But I really want to see a certain movie, so I have decided to go this one time."
For example: "As a rule, I go to bed by six (I'm an old man), but I have decided to attend the Joneses' party. I will leave by 9 p.m."
For example: "American television programs, as a rule, do not allow 'dirty' words to be heard. But it was decided that the word '____' would be allowed this one time because it was an important part of the drama."
Student or Learner