1.1.3  Referring Expressions 

In this paper, in the purpose of the conformity and convenience of the term, I define that the term “referring expressions” includes the deictic expressions and reference. And as is mentioned above, the types “personal referring expressions” and “demonstrative referring expressions” will be discussed and explored. Personal referring expressions by nature include personal pronouns, adjectival possessive pronoun, nominal possessive pronoun, and proper names, titles, social characters under special circumstances. Demonstrative referring expressions include words that refer to time or place.