被动语态to be与being
问题描述：
被动语态to be与being
being 正在进行,to be将来要做
1.they insisted on the design being finished tomorrow.
a.being finished b.to be finished
为什么B是错的?
2.The children went there to watch the iron tower__
a.being ecrected b be erected
选什么?为什么?
答
1,being finished,因为insist on+doing 是固定搭配
2,being ecrected,因为是被动语态