I went to see her only to find her out?

问题描述:

I went to see her only to find her out?
我肯定的是:“out”是“宾补”(因为书上是这么写的)
请问:主语——I、谓语——是“went to”+“see”吗?、宾语——her
宾补——out
那么:only to find her——在句中做什么成分?

I——主语
went——谓语
to see her——宾语
only to find her out——动词不定式作的“结果状语”