a.where
case 做先行词,它的从句总是用where 引导.如:
1.There are some cases where the rule does not hold good.
在有一些案例中,规则是无效的.
2.There are many cases where the pen is mightier than the sword.
文胜於武的情形很多.
3.The legal precedent applies to cases where the parents of the child are divorced.
该法律先例适用于已离婚的孩子的双亲的诉讼案.