关于point后面的引导词

关于point后面的引导词

在定语从句中，当先行词为 point,case,situation等，其后为一完整句子时，通常用关系副词where引导定语从句。
After graduation she reached a point in her career where she needed to decide what to do.追问你这不是白说了 辅导书上说when也可以做引导词啊。什么叫做通常,我要理解性的好不。