“De(的)”is the most frequently used word in Modern Chinese and has three basic usages:1)a constructional auxiliary used as a marker of modifier;2 )a constructional auxiliary used as a marker of nominalization;3)a modal auxiliary used as a marker of stance.Based on a fairly large cor-pus,this paper analyzes the differences of “De(的)”between Macau Chinese and Mandarin Chinese. The research shows that the frequency of “De(的)”in Macau Chinese is much lower than that in Man-darin Chinese with a ratio of 1:1.7.The paper focuses on ...