为什么he transplanted the little tree to the garden _ it was the best time for it要用when而非where

问题描述:

为什么he transplanted the little tree to the garden _ it was the best time for it要用when而非where
为什么不可以将它看成是garden的定语从句呢?

从语义来说it was the best time for it是来修饰the little tree的,而不是the garden,所以后面一节不能作为the garden 的定语