英语回声疑问句的研究传统上主要属于语用解释,但是其wh-词没有进行显性移动,而是保持原位,而且wh-词可以对子句、短语和词汇多层面进行设问。这种句法特性目前引起的关注不够。本文在对照英语常规wh-疑问句式与回声疑问句式的结构特点基础上,对其句法性质加以解读,认为Sobin的语域赋值和非选择性约束假设对英语回声疑问结构具有很强的解释力,并指出其对汉语相关结构的研究也有一定的启示,但同时也指出了其存在的不足。 The study of English echo interrogative sentences has traditionally been mainly a pragmatic explanation, but its wh-words have not been dominantly moved, but remain in place, and the wh-words can ask questions at the multi-level of clauses, phrases and vocabularies. This syntactical trait currently draws less attention. This article interprets the syntactic properties based on the structural features of the conventional wh-questions and echoes in English. It is concluded that Sobin’s domain assignment and non-selective constraints have strong explanatory power on the structure of English echoes. It is pointed out that there is some enlightenment to the research on the related Chinese structures, but at the same time it points out its shortcomings.