Ifound Dirk waiting for me on the steps. He seemed to see nothing, and did notnotice that I had joined him till I touched him on the arm. We walked along insilence. I tried to imagine what had happened to drive the poor creature tothat dreadful step. I presumed that Strickland knew what had happened, forsomeone must have been to see him from the police, and he must have made hisstatement. I did not know where he was. I supposed he had gone back to theshabby attic which served him as a studio. It was curious that she should notwish to see him. Perhaps she refused to have him sent for because she knew hewould refuse to come. I wondered what an abyss of cruelty she must have lookedinto that in horror she refused to live.
上面黑体字中，for someone must have been to see him from the police: must have been to - 这里表示推断，原来是be to结构吧？用在这种must havebeen to结构中，表示什么呢？
另外，结尾处，黑体字中that in horror中的that是引导定语从句sherefused to live作宾语吧？
1 for someone must have been to see him from thepolice
must have been to see无疑是be to do结构，而be用了must have done形式，为对过去做的一定的推断。假如句子用was to see him则意为在故事讲到这里的时候，to see him这个安排中的动作还没发生。目前用must have been to see him, 则是推断在故事讲到这个地方的时候，一定已经安排人作了该动作了，即一定安排某人去警局接他出来了。must have been to do sth这种结构不多见。但它不外乎是个be to do结构，与must have done结合起来理解即可。
2 that从句为结果状语从句。注意前面what an abyss引导名词性感叹分句。其对应的陈述分句为 She must have looked into such an abyss that in horror sherefused to live. 如此，such... that...引导结果状语从句就更了解了。
