How( )staying?For five days.为什么不填long they will be,而是要填long will they be?

问题描述:

How( )staying?For five days.为什么不填long they will be,而是要填long will they be?

这是一个特殊疑问句,要用疑问语序,助动词will要用在主语they 前;在做从句时用陈述语序,主语用在谓语前.如:I want to know how long they will be staying .