“所”是中学文言中出现频率比较高的文言虚词。对于它的词性及作用历来是众说纷纭。这里想根据自己的体会,结合各家明见,提出一些看法。一我对“所”的词性的基本判断是:“所”是一个特殊的指示代词,它必须和动词或介词结合构成“所字结构”,才能表现出它所指代的意义。由于“所字结构”使用比较灵活,所以“所”指代的作用也有较多的变化,其具体解释要根据具体句子而定。 “所 所” is a classical Chinese feature frequently appeared in middle school classical Chinese. For its part of speech and role has always been divided. Here, I would like to make some suggestions based on my own experience and my own opinions. A basic judgment of the part of speech of “所 所” is that “所 所” is a special demonstrative pronoun that must be combined with a verb or preposition to form a “structure of the word” in order to show what it refers to. As the “structure of the word” is more flexible to use, the role of “所” refers to more changes. The exact explanation depends on the specific sentence.