定语从句问题 英语高手讲解下

Question

The classroom whose door is broken will soon be repaired. 将句中 whose引导的定语从句 改成of which
1。 The door of which classroom is broken will soon be repaired.
2. The classroom the door of which is broken will soon be repaired。
3,。 the classroom ,the door of which is broken ,will soon be repaired .
请问这几句改得对么？

Answer 1

第三句非限制性的对，第二句限定性的应把介词+关系代词放前面，即：
The classroom of which the door is broken will soon be repaired.

Answer 2

第二句和第三句改对了，还可以改成：
The classroom of which the door is broken will soon be repaired.或
The classroom ，of which the door is broken， will soon be repaired.

Answer 3

很别扭啊，为什么要改成这样，最好符合表达习惯来，不要为了改而改。

Answer 4

第一句不对啊。