Some survivors were found to have suffered psychiatric disorders in the aftermath of the earthquake. Others were trying hard to blot out the memory of the tragic event.
请问，句中的 have suffered 表示的是从过去的某一时刻起到今天都在遭受精神错乱的困扰吗？
Some survivors were found to have suffered psychiatric disorders in the aftermath of the earthquake.
这句话还原成主动语态则为：
They found some survivors to have suffered psychiatric disorders in the aftermath of the earthquake.
虽然不定式和目前分词都可以在found之后作宾补，但做宾补的目前分词不可以为完成体，而不定式作宾补可以有完成体。宾语罹患精神疾病是在谓语动词found之前发生的并持续到found的这时，主动意义，因此只可以用不定式的完成体作宾补，表示从过去持续到谓语时间的状况。