The classroom whose door is broken will soon be repaired.

问题描述:

The classroom whose door is broken will soon be repaired.
= The classroom the door of which is broken will soon be repaired.这两个句子中的,主语和宾语,还有像这种句子如何分辨主语和宾语.

这是一个定语从句.主*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.