I had told them the reason , for which I didn't attend the meeting.

问题描述:

I had told them the reason , for which I didn't attend the meeting.
请问为什么要for which

此句本来应该是I had told them the reason why I didn't attend the meeting,因为关系副词when、where和why可用介词+which代替,这里原来是for the reason ,所以改成which时用the reason for which这里for which 和w...