Correct

曾几何时

/ zēng jǐhé shí / 
Strokes

Definition

just a while before/not so long ago/everyone can remember when..

Example

Definition

before long; not long after/afterwards; not long since; it was not long before

1
Zēngjǐhéshí
曾几何时
  
,
zhège
这个
chéngshì
城市
fāshēng
发生
le
了
rúcǐ
如此
jùdà
巨大
de
的
biànhuà
变化
  
。

Before long drastic changes took place in this city.