the time when i met him.这里的when=at which所以这句也可写成i met him at
2个回答

关系副词why,在定语从句中作状语,表示原因,why的先行词只能是reason.why可用for which代替.

Is this the reason why (=for which) he refused our offer? 这就是他拒绝我们帮助他的理由吗?

The reason for which he was disissed from the job = the reason why he was dismissed from the job.(作状语,用关系副词)

the reason why he didn't come = the reason for which he didn't come.

because of which = for which