Echo utterances in Chinese conversations often present the feature of perspective switch.External perspective switch refers to the speaker's realization that he/she and the other interlocutor hold opposite positions in communication;It is necessary to switch the speaker's position in the perspective framework via echo utterances in order to highlight the relative speech,self-speech or the other party's speech.Internal perspective transformation,on the other hand,indicates that the speaker realizes that he/she and the other interlocutor are opposite in the interpretation of information;It is necessary to change the perspective position,observation mode and content in the perspective framework via echo utterances so as to alter the polarity orientation or focus orientation.In comparison,feedbacks such as dui(对),shi(是),hao(好)and en(嗯)in conversations simply indicate a one-way inheritance of the other party's perspective framework for the expression of convergence.It does not show any opposition on the position in conversion or the interpretation of information.
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