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 be connected to 含义是什么？

教美式发音的美国老师说的：I was connected to a teacher.意思是：我联系上了一位老师。请教老师：这里的connected是形容词还是被动语态呢？为什么be connected to 是联系上 的意思呢？这里的介词to可否换成with呢？谢谢！

话题 be likely to

话题 to be adj

话题 be going to

话题 be to do

话题 to be done

话题 meant to be

话题 seems to be

话题 to be above

话题 to being done

话题 to be sure

话题 to be made

话题 to be pleased

话题 be related to