先秦汉语中表果连词“故”来源于表“往昔,旧时”义的名词“古”。表“往昔,旧时”义的名词“古”受表“现在”义的名词“今”的影响,通过相因生义的方式发展出表果连词义,后来表果连词义的“古”被改写成“故”。在“古”的表果连词义的形成过程中,相因生义的第三种模式起了决定性的作用。 Pre-Qin Chinese table fruit conjunctions “Therefore ” from the table “old, ” nouns “ancient ”. Table “old, ” nouns “ancient ” by the table “now ” the meaning of the noun “today ” effect, through the phase of the corporeal way to develop the table with the word meaning, and later If the meaning of the word “ancient” is rewritten into “so”. In the “ancient” fruit of the formation of the meaning of the formation of the third phase of the causal eugenics played a decisive role.