介词+which+time 引导定语从句，which做定语（during which time等）
本帖最后由 IsaacZ 于 2013-1-11 08:12 编辑which在一般的定语从句中是独立来指代的，后面不加任何并列的词。但是要注意这些特殊情况。在以下情况中，which在定语从句中，相当于做定语：
I may have to go into hospital, in which case I won't be going on holiday.
我可能要住院，如果那样我就不去度假了。
She may have missed the train, in which case she won’t arrive for another hour.
她可能没有赶上火车，那样再过一个小时她也到不了。
Tom spent four years in college, during which time he learned French.
汤姆读了四年大学，在此期间他学了法语。
这种情况很特殊，只有少数几个词这样用，所以要特别关注。
相关参考：by which 和 by which time 引导定语从句用法一样吗？
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