Wang Fuzhi suggests in Shuo Wen Guang Yi that modal particles all have their roots,and function words come from notional words; the terms he has used preliminary illustrate his classification awareness of function words＇ sub- category; he pays more attention to documentary evidence when explaining function words; he discusses about the function words that hold two or more classes,and portrays the different usages of the same function word in detail; he attaches more attention to the comparison of function words of the same kind,and talks about...
