语言演化是语言内部演变和外部接触共同构成的,但两者极难以区分,这是一个世界性难题。历史语言学中的好些关键难点问题,都是因为很难断定是内部演变还是外部接触的区分造成的,结果使很多重要的研究不能进一步展开。比如,现代汉语是VO型语言。但现在已经有比较可靠的证据证明汉语和藏缅语同源,而藏缅语是OV型语言,因此汉语和藏缅语一定有一种语言改变了述宾结构的语序。这种变化是内部演变还是语言接触的结果,至今没有弄清楚。于是,上古汉语在一定条件宾语呈现OV的形式到 Language evolution is a combination of internal language evolution and external contacts, but the two are extremely difficult to distinguish. This is a worldwide problem. Some of the key and difficult issues in historical linguistics are difficult to determine because of internal differentiation or external contact. As a result, many important studies can not be further developed. For example, modern Chinese is a VO language. However, there is already more reliable evidence that Chinese and Tibetan-Burmese languages ​​are homologous, while Tibetan and Burmese are OV languages. Therefore, there must be a language in Chinese and Tibeto-Burman that changes the order of the prophet structure. Whether this change is the result of internal evolution or language contact has not been clarified so far. Thus, the ancient Chinese object in a certain condition presents OV form