In the diachronic level, we not only inspected representative works of the Ancient Chinese, Middle Chinese and Modern Chinese, but also made qualitative and quantitative analysis.

• 历时层面,我们按照公认的对汉语的四分法,分别考察了上古汉语、中古汉语、近代汉语三个阶段有代表性的著作,也是有定性分析和定量分析。