the reason for和the reason to的区别

Question

另补充一题：
The reason he ____ his absence is still unclear to un all.
（1）下划线处写for还是to?
（2）如何翻译本句？
谢谢回答！ :- )

Answer 1

题目肯定有问题，是不是：The reason (for) his absence is still unclear to us all.
句中的he明显是多余的。

此块的常用搭配为：
the reason for sth 某事的原因
the reason for doing sth 做某事的原因
the reason for sb/one's doing sth 某人做某事的原因
the reason for sb to do sth 某人做某事的原因

Answer 2

章老师对的

Answer 3

for .我们不清楚他缺席的原因本回答被提问者采纳