The city had once known as prosperity

题目

The city had once known as prosperity
explain this sentence,esp.the use of the word "prosperity"
shouldn't it be "the city had been known as prosperity."
thank you

答案

这座城市曾经因繁荣而为人所知.
你说的是对的,严格上是要加个BEEN,但英语里有很多的用法是不规范的,就像中文中很多习惯用法也不符合语法一样.