定于从句的问题Is this the reason why (for which) he refused our off

Is this the reason why for which he refused our offer?为什么中间会 This is the reason why\for which he is late for school.为什么wh this is the reason 【why】he was late for school? this is the 定于从句还是同位语从句?the reason why he missed the train was that he g 求高手指教.This is the reason for which he didn't come to meeting Do you know the reason why/for which he didn't come?这句话的意思? What is the reason that he gave for this?为什么是定语从句啊 the reason(why\which) he explained 改错:the reason why he is always late for class 定语从句 is this the reason （ ）he was lat The reason why 可以代换为the reason for which The reason why he is here is simple.是同位语从句还是定语从句?