i don't konw the reason for which he has late for school拆成2个句子.

问题描述:

i don't konw the reason for which he has late for school
拆成2个句子.

He was late for school.I don't know the reason.

根据句意,应先写后面的一句,再写前面的句子
He is late for school. I don't know the reason.

I don't know the reason.
He is late for school.