only to do的解释和用法是什么？

only to do 表示未曾料到的愉快或不愉快的结果。

She woke early only to find it was raining.

她早早起来结果发现下雨了。

He got home only to learn that his father was ill.

她到家后结果得知她的父亲生病了。

He got to the station only to find the train had gone.

他到了火车站结果发现火车已经离开了。

She hurried back only to find her old friend George waiting for him.

她匆忙回来意外地发现她的老朋友乔治在等她。