表因文言虚词“以”,应当说有介词和连词两种词性。虽然都是“表因”,虽然都可译作“由于”或“因为”,但差别很大,是既不能等同,也不能混淆的,这里,试以中学语文教材实例比照着说明表因介词和连词的区分问题。一、从组成成分和语法功能上区别: (一)作为表因由的介词“以”,引出行为动作形成的原因,后面常带宾语,整个介宾结构作状 Table due to classical function words “to”, there should be prepositions and conjunctions two parts of speech. Although they are all “form factors”, they can both be translated as “due to” or “because of” but they can not be equated or confused. Here, we try to compare examples of Chinese textbooks in secondary schools with prepositions and Conjunctions of the problem of distinction. First, from the composition and grammatical function difference: (a) as a preposition of “table” reason, leads to the formation of behavioral reasons, often followed by the object, the entire structure of the mediator