This thesis s research object is four adverbs of "huxiang", "xianghu", "hu" and "xiang" which expresses mode in the modal adverb, and they are called by a joint name of "huxiang" category adverb.
In recent years, scholarsfromdifferentanglesto the "After" categorytoneAdverbresearch, andhas madeconsiderable research. Looking at the resultsof these studies we can find.