This process includes ellipsis subject detecting and ellipsis subject recovering . we put forward and implement a method to detect subject ellipsis in the semantic structure of a sentence , and a " candidate - selecting " strategy to recover the elliptical subject by syntactic conditions , semantic conditions and context conditions 處理過程分為主語省略的識別和主語省略的恢復,提出了一種在漢語句子語義結構中識別主語省略的方法和一種從句法、語義和上下文語境多方面綜合判斷的“候選-選擇”主語省略恢復策略。