Помогите определить видо-временную форму и залог глагол сказуемого?
1.The white exteriors of the tower blocks are decorated at intervals by pleasant blue-coloured panels which appear to be of some ceramic material.
2.It was explained that Roy was unaccountably absent from duty that morning.
3.If you come so late the front door will be locked and you'll have to go by the back door.