被动：The calassrom should be cleaned (by us)everyday.
一般：should we clean the classroom rveryday是被动语态的一般疑问句，没有分开来的好么should the classroom be cleaned (by us)every day?变成一般疑问句时be也不用变的是么？should be固定搭配变成疑问句，should提前，be被留在后面