Don't eat in the classroom. 在教室里不要吃東西。Don't fight in the classroom.在教室里不要打架。Don't listen to music in the classroom.在教室里不要聽音樂。Don't wear a hat in the classroom.在教室里不要戴帽子。Don't run in the classroom.在教室里不要跑動。Don't be noisy in the classroom.在教室里不要吵鬧。Don't quarrel in the classroom.在教室里不要吵架。Don't play ball games in the classroom.在教室里不要玩球。Don't talk londly in the classroom.在教室里不要大聲說話。Don't throw litter about in the classroom. 在教室里不要亂扔垃圾。----也可以把in the classroom（在教室里）改為in class（在課堂上）。另：在課堂上不戴帽子是一些學(xué)校的規(guī)定，因為會影響后面同學(xué)的視線。