the reason for后面加什么
the reason for后面接名词或名词性短语；
例句
What is the reason for it?
原因何在?
Thats the reason for Christmas.
这就是圣诞节的真正来由。
Being worn out is the reason for replacing your blanket.
用破是换毯子的原因。
What can be the reason for such a crowd close by the pigsty?
猪圈边这么多人，是什么原因呢？
They want the public to understand the reason for the shortage.
他们想让公众了解短缺的原因。