Who is the owner of the watch?

主语是who还是the owner of the watch?这样的情况更倾向于哪个是主语？

这种表语为确认性表语。表语和主语可以互换句法功能。需要依据语境判断什么是主语。没上下文的状况下，把who剖析为主语较为简单。