only to 后接动词原形，only to do 通常用来做结果状语，通常是一种意想不到的结果，或者是最终的结果。

例如：He fell down from a tree, only to break his legs. 他从一棵树上掉下来，只是摔坏了双腿。He went abroad, only to come back the next year. 他出国了，仅仅是次年就回来了。