比较句中的would otherwise have been expected语法结构

Researchers calculated that there were 1,800 more suicides than would otherwise have been expected in the next four months.

【翻译】研究人员预测，在未来四个月内，自杀人数将比原本预期的要多出1800人。

【分析】网友的句子中含有more...than...结构，在此就不分析了。此外，than 引导的从句是一个“含蓄条件”虚拟语气句。这个含蓄条件就是otherwise，它的意思是：“要不然；与之相反”。本句的otherwise 就是“与之相反”的意思。由于是个比较句式，所以，这层意思可以不用翻译出来。

would have been expected 表示“与过去事实不符”：事实是比“原本预期的多出1800人，说明原来预期得不正确，与事实不一致”。

又如：

He reminded me of what I would otherwise have forgotten.

幸亏他及时提醒我，要不然我就忘了。

We must care for the weak who would otherwise fall by the wayside.

我们要关心那些弱者, 不然他们会因失败而放弃努力的。

来自辞典例句

我把它们分别分成两句，就好理解了：

He reminded me of that; otherwise, I would  have forgotten it.

We must care for the weak, otherwise they would otherwise fall by the wayside.