It's reported that many a new house( )at present in the disaster area.

问题描述:

It's reported that many a new house( )at present in the disaster area.
为什么会用is being built中的is

这是进行时的被动态语态:is being done如果是人作主语就是 It is reported that people is building many a new house in the disaster area.房子作主语,就要改为被动语态了.is being built. 另外还有这个many a 的...