研究发现: 上海方言疑问句系统里存在着“话题疑问句”与“命题疑问句”。前者是“S伐?”后者是“S, VP伐?”并且进行了多角度的比较, 指出命题疑问句不但数量多, 而且是优势句式。两种疑问句存在着一系列的区别点, 从中可以看到一些有趣的语言现象以及演变特点: 1.多个来源, 导致多元化。2.两类互补, 形成主流化。3.多类消长, 导致杂糅化。

This paper proposes that there exist topic-in questions and proposition-in questions in the interrogative system of Shanghai dialect.It compares the former to "S fa?" and the latter to "S, VP fa?" in different aspects, and finds out that the proposition-in question is of great amount and significance.The two differ in several ways, through which we can see some interesting phenomena and characteristics of language changes, including 1)multiplication with multiple resources, 2)mainstream transformation with bilateral complementary relations, and 3)complication with actions and reactions.