副词"可"具有多种语气功能,得到了广泛关注。有学者对语气副词"可"的功能进行统一解释,认为"可"是一个标示话题焦点的焦点敏感式。但是,"可"能够出现在独立的句子中,其前面的成分可以省略,主语有时不表示对比,这些都与话题焦点的性质不符。"可"的作用是强调其后的成分是对比焦点,"可"应当是标示对比焦点的焦点敏感式。
The adverb"Ke"displays various modal functions,which has been received a great deal of attention. Some scholars give a unified explanation for the functions of the modal adverb"Ke",regarding"Ke"as a sensitive operator marking a topical focus.However,such facts as the following are inconsistent with the nature of a topical focus,i. e.,"Ke"can appear in a separate sentence,the constituents in front of "Ke"can be omitted,and the subject sometimes doesn't convey contrastive meaning. We consider the role of "Ke"highlight the constituent following "Ke"therefore,"Ke"should be a focus-sensitive operator.