根据句式:主谓+其他,找一个句子的主语,优先判断谓语部分,谓语前的是主语部分(除倒装结构,如there be + 主语),谓语后面是宾语,表语(如谓语是连系动词时),或状语等。但这个句式有个前提条件:肯定句。
而Who is the owner of the watch?是个特殊疑问句,特殊疑问句一般句式是:特殊疑问词+ 助动词/(可提前)谓语动词+ 主语+ 谓语部分剩余部分+其他?
所以,该句的肯定句句式应该是:The owner of the watch is who. 以此根据肯定句主谓结构的句式去判断,可知主语是The owner of the watch,所以主语不是who,而是the owner of the watch。
Who is the owner of the watch?
主语是who还是the owner of the watch?这种情况更倾向于谁是主语?
【答】如果没有上下文,这个句子的 Who 可以是主语或者表语。如:
Who is the owner of the watch? —— Mr. Wu is (the owner of the watch). (Who 是主语, the owner of the watch 是表语)
Who is the owner of the watch? —— The owner of the watch is Mr. Wu . (Who 是表语, the owner of the watch 是主语)