It is now being sent to his home by train.这是形式主语么?怎么理解it is
问题描述：
It is now being sent to his home by train.这是形式主语么?怎么理解it is
这里有is了,怎么还可以有 being sent,这不就变成两个谓语动词了么
答
这里的关键是now,这now放在后面你也许就理解了.这里的句型是be doing,换一种写法也就是It is being sent to his home by train now.它正在被火车送到他家来.now放在be和doing之间强调现在,要把be doing看做一体而非it is