On Grammaticalization Process of the Chinese Character "YOU"

The grammaticalization of the Chinese character verb YOU mainly goes through such a process___verb preposition conjunction.The main reason why YOU changed from a verb into a preposition is that it always changes its syntactic position in a sentence.Also metaphor and re-analysis are the important mechanisms of such change.Chinese character YOU,as a preposition,can be used to show the starting point of space and time,tell the cause,basis of the event and so on.The usage of Chinese character YOU as a conjunction is formed from the further change of it that from a substantive word to an empty word as a preposition used to tell reasons,and this is closely related with the syntax elements following Chinese character YOU.