The classroom whose door is broken will soon be repaired.
2个回答

这是一个定语从句.主干部分是The classroom will soon be repaired.,whose door is broken 是一个定语从句,用来修饰先行词the classroom的.所以整句话的主语就是the classroom.will soon be repaired就是谓语部分,是一个被动语态,没有宾语,或者说介词by(被.)带的宾语省略了.