【英语同义表达辨析】Don't smoke VS No smoking: "no smoking" is something you typically see on a sign that prohibits smoking; "Don't smoke" sounds like you are telling someone not to smoke. 二者使用语境不同、目的不同。前者是祈使语气，用于警告劝告；后者用于标识。语言结构形式上，前者动作性强（时间性强），后者动作性弱（无时间性）