介词+witch引导定语从句

I have many shoes,of which I like the Nike best.
我有很多鞋，其中我最喜欢那双Nike的

介词+which其实从某种意义上来说,可以用where来代替,我们可以让at,on,from,in,for来和which搭配.通常这些介词是在从句中但是提前了.例如:
I have gone to Beijing in which I had a good time with my friend.
The date on which we joined the Party was July 1st,1992.
He came at a time at which we needed help.

补充:用Why引导的原因状语从句的先行词是REASON,WHY可用FOR WHICH代替
For example:I know the reason why he was late=I know the reason for which he was late

on which 代时间,等于when.
in which 代地点,等于where.
For examlpe:I like Nanjing in which I have ever lived.