Function words in modem Chinese mostly originate from national words. They go through a longer process of grammaticalization. Chinese character word of "lian" has a lot of usage in modem Chinese. The difference of synchronic is the result of dianchronic's different development stage. As a verb,the original meaning of "lian" was" to link up", Later, because of the change of structure relationship and sentence structure,its meaning became general. On the contrary, the general meaning also led to the change of structure relationship and sen...