So, that's the most complex construction, the third conditional.

所以，这是最复杂的结构，第三个条件。

Well, this is kind of a simplified explanation, but explains why English lost a lot of its complex constructions, such as masculine, feminine and neuter nouns that there used to be an Old English, but not anymore. And it's cases.

嗯，这是一种简化的解释，但解释了为什么英语失去了很多复杂的结构，比如阳性、阴性和中性名词，这些名词以前是古英语，但现在不是了。这就是原因。