a generation ago的意思|示意
约三十年以前，一代人以前
a generation ago的用法详解
a generation ago 是一个习惯用语，意思是“一代之前”，可以用来表示发生在某一段时间之前的事情，时间一般不会超过50年。
一般情况下用法和一般的副词一样，可以放在句首、句中、句末，一般要和一个动词搭配：
1. 句首用法：
A generation ago, Americans were playing baseball on the street and in the backyard.
2. 句中用法：
We were taught our times tables a generation ago.
3. 句末用法：
The house has remained unchanged for a generation ago.
总之，a generation ago 可以用来表示发生在一段时间之前的事情，时间一般不会超过50年，语法和一般副词一样，可以放在句首、句中、句末。
a generation ago相关短语
1、 Just A Generation Ago 不过一代人之前
a generation ago相关例句
A generation ago, it was thought that babies born this small could not survive.
20多年前,人们认为这么大点儿的新生儿是活不下来的.
柯林斯例句
Problems that were very appealing a generation ago may have been resolved.
在一代人以前非常热门的问题可能已被解决.
互联网
Just a generation ago, women were largely confined to repetitive, menial jobs.
就在上一代人, 女性被限制于主要从事重复生产 、 仆人工作.
互联网
Once before, a generation ago, world conditions had given women the chance for emancipation.
在过去, 一代人以前, 世界形势曾经给妇女获得解放的机会.
辞典例句
A generation ago , men and women rarely mated with anyone from a different town or city.
而我们的上一代人却很少与自己所在城市以外的人婚配.
时文部分
A generation ago genetic codes were certainly unknown.
遗传密码在上一代确实很少有人知道.
《简明英汉词典》