谈“所以”在因果句式中的流变吴丽君在现代汉语中，“所以”一词的用法主要有两种：一种是在因果复句表结果的分句前面，作连词；一种是用在“之所以……，是因为……”这种固定搭配中，这是人所共知的。至于这两种用法是怎么形成的，它与古代汉语中的“所以”有怎样的区... On the Change of “So” in Causal Sentence Patterns Wu Lijun In modern Chinese, there are mainly two kinds of usage of the word “so”: one is the conjunctions in front of the clause of the causal complex sentence list; It is well known that “the reason why ... is because ...” is a fixed match. As for how these two usages are formed, what is the “so” of ancient Chinese?