The Grammaticalization Analysis about the Word "yaome(要么)"

The word yaome(要么) is a common selective conjunction in modern Chinese,it was firstly placed at the end of the interrogative sentence in the form of the cross-structural combination,but because the interrogative word me(么)loses its function,thus makes the diversion on the sentence places,and such words as zheme(这么) name(那么)zenme(怎么) etc,would make it lexicalization further more.The reason that many main verbs exist in the sentences help to bring about further grammaticalization from lexicalization,so the inherent meaning of sentences help to realize the selective function in the end.