whose is this sweater.whose 和sweater各做什么成分?

问题描述:

whose is this sweater.whose 和sweater各做什么成分?

表达错了,应该是:Whose sweater is this?这是个特殊疑问句,可以还原为陈述句:This (物主代词)sweater(主语) is(系动词) whose(表语).