At school there are strict rules————.为什么是to be kept

问题描述:

At school there are strict rules————.为什么是to be kept
而不是kept / being kept 他们的区别是什么

to be kept:不定式的被动态表示将来的动作,在学校,严格的规章制度是要遵守.在there be 结构中,不定式的主动表示被动.也可以用to keep.
kept,是过去式,在句中不能同时出现两个动词.
being kept,是被动的进行时态,语境不对.