“Jiyu” is generally acknowledged as a preposition in Chinese. But according to my research, “Jiyu” can also be used as a verb in Chinese. So I once argued that “Jiyu” was one of the double classified words. When a word is attributed to both verb and preposition, there are some differences in meaning, for example, the preposition “Ba” is quite different from the verb “Ba” in meaning. When we classify the term “Jiyu”，we should consider both the function and the meaning of the word. However, after more thorough study of the word “Jiyu”, I’ve found that there is no difference between the so called preposition “Jiyu” and the verb “Jiyu” in meaning. So I argue that “Jiyu” is just a verb.