Question

考研英语长难句分析If its message were confined merely to information

Answer 1

首先,这是一个“纯”虚拟语气句式；其次,破折号后面至逗号前的一段是对前面句子的补充；最后,”for“是连词不是介词,意思是 because, since, seeing that 等.

that in itself would be difficult if not impossible to achieve 中的 that 指前句的整个假设；difficult if not impossible 是个常见的搭配表达方式,意思是“很难（做到）.句子翻译：就这一点想做到都很难.