从“在”和“从”的发展演变看词的兼类现象吴承玉汉语的词在其发展演变过程中，有实词虚化的现象。现代汉语里的许多介词都是从古代汉语里的动词发展演变虚化而来的。动词是实词，介词是虚词。汉语的动词在逐渐虚化为介词的过程中，就产生了词的兼类现象。因此，我们在研... The Similar Phenomenon of Words in the Development and Evolvement of “Zai” and “Zhong” Wu Chengyu Chinese words in their development and evolution have the phenomenon of empty words. Many prepositions in modern Chinese are derived from the development and evolution of the verbs in ancient Chinese. Verbs are real words, prepositions are virtual words. Chinese verbs in the process of gradually virtualization into prepositions, resulting in the phenomenon of both types of words. So we are researching ...