【简明语法】18.5 介词+关系词

1）介词后面的关系词不能省略。
2）that前不能有介词。
3） 某些在从句中充当时间，地点或原因状语的"介词+关系词"结构可以同关系副词when 和where 互换。
　 This is the house in which I lived two years ago.
　 This is the house where I lived two years ago.
　 Do you remember the day on which you joined our club¹?
　 Do you remember the day when you joined our club?

1 club   

n社团；俱乐部，夜总会，社；棍棒，（高尔夫球等的）球棒， （扑克牌）梅花；vt.棍打，把...当棍棒用；协作，联合

参考例句：

• He joined the football club.他加入了足球俱乐部。
• He is managing a club for teenagers.他在经营一家青少年俱乐部。