[题目] on which, in which 或 at which?

楼主: trtr112 (pk)   2019-04-29 23:32:39
各位先进,
有一句子是这样`: There are certain times when we need our friends.
请问这里的 when 如果要用"介词 + 关代"替换, 是不是用 in which比较好呢?
改为: There are certain times in which we need our friends.
谢谢各位!

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