He has gone through many a severe test during his lifetime.这个句子为什么有many还有a.

问题描述:

He has gone through many a severe test during his lifetime.这个句子为什么有many还有a.

many + 可数名词复数形式
就等于
many + a + 可数名词单数形式
都表示“很多……”

这是英文中比较常见的一种表达法,与 many (severe) tests 意义完全一样.
没别的,英国佬设这些规则,就是为了让英文显得更“高深”一些而已.