问题 虚拟语气被动句的to be是不是可以省略

I know it looks rather dirty now, but imagine the house were (to be) repainted.这句话的to be 是不是省略与否句意都一样？

问题 不定式为什么没有to

I never know him do such a thing.这个句子中的动词do为什么没有to？

话题 but to do

话题 to the relief

话题 as as to

话题 left to itself

话题 be likely to

话题 to be adj

话题 to that intended

话题 不定式省略to

话题 不定式，to省略

话题 be going to

话题 to have been

话题 to do sth

话题 be to do