定语从句do you know the reason why he didn't come?我把why换成that可以吗?变成 do you know the reason that he didn't come

定语从句do you know the reason why he didn't come?我把why换成that可以吗?变成 do you know the reason that he didn't come
定语从句do you know the reason why he didn't come?
我把why换成that可以吗?变成 do you know the reason that he didn't come

定语从句do you know the reason why he didn't come?我把why换成that可以吗?变成 do you know the reason that he didn't come
不行 做原因状语只能用why