Question

many a后面加单数还是复数

Answer 1

many a 许多的 ，后面跟 名词单数 ，如：

Many a good man has been destroyed

by drink .

汉语：许多好人都毁在了饮酒上 。

As a plant scientist, he may have saved more lives than anyone else in history as many a as billion , by some estimates .

Answer 2

后面加的是单数名词，比如many a
book意思是“许多的书”，相当于many
books

Answer 3

这个短语修饰的名词作主语谓语动词用单数。