修辞疑问句是疑问句探询功能不断消减弱化,句式结构发生变化,消磨其作为疑问句的句法特征,最终退化为非疑问句的过程,是疑问句的语用性嬗变和语法性嬗变的结果。修辞问句有标记项而疑问句无标记项,修辞问句显示出区别于疑问句的语法、语义特征。 Rhetorical interrogative sentences are the result of the pragmatic evolution and grammatical transmutation of the interrogative sentences, which is the process of decreasing and weakening the interrogative function of interrogative sentences, changing the syntactic structure, destroying the syntactic features of interrogative sentences and eventually degenerating into non-interrogative sentences. Rhetorical questions have marked items and questionable sentences have no marked items, and rhetorical questions show the grammatical and semantic features different from interrogative sentences.