age作为先行词的定语从句用什么关系词?
我阅读遇到这样的句子:
Whenshegottoanagewhereshegainedenoughskilltogooutsidehergarden,sheaskedhermotherifshecouldgoforabikerideoutsidethegateanddownthelane.
其中的定语从句为什么不用when?
问题补充:age应该指时间,却不用when
why?