请定语从句do you know the reason for which he didn't come还原成简单句.

请定语从句do you know the reason for which he didn't come还原成简单句.
请定语从句do you know the reason for which he didn't come还原成简单句.

请定语从句do you know the reason for which he didn't come还原成简单句.
Do you know why he didn't come?

do you know why he didn't come？

Do you know the reason？
He didn't come for the reason.

can you tell me why didn't he come.

Do you know the reason of his not coming?
注意：不能改成宾语从句。

目前都看不懂，等我在美联英语培训中心，学好了英语再来答题。美联英语挺不错的，他们是全国连琐，口碑各方面都很好，最近还有免费体验课呢