According to the relationships provided by conceptual structure system and the inspection of common examples,the sentence pattern of ＂S＇ is ＂P＂ is the relationships between propositions.The copula ＂Shi＂ is a relative and it shows three relations between concepts： generic relations,equal relations and similar relations.The explanation of copula ＂Shi＂ is the unification on the basis of relationship and the relationship logic is expected ...
