之前的英文单词怎么写
例句：
Previous to this, she'd always been well.
这以前，她身体一向很好。
This erstwhile schoolmaster had discovered a way of keeping us quiet in the evenings.
这位往昔的老师找到了一种让我们晚上安静下来的方法。
We were delighted to discover a new community garden where erstwhile had been a trash-filled vacant lot.
我们很高兴发现了一个新的花园社区，这个花园以前是一个填满垃圾的地方。
They had some trouble once over a halter, and, both being good haters, there was bad blood between them.
他们两人以前为了缰绳的事发生过一些龃龉，因为两人都是记仇记恨的`人，所以宿怨不能消解。
slough off former associates.
抛弃以前的同伴。
Ages anterior to the flood.
诺亚洪水以前的时代。
Apples are green when unripe.
苹果在成熟以前是绿色的。
I used to be a cheerleader for a group of fans.
我以前是一群球迷的啦啦队长。
The backup Javascript configuration file was absent or had errors.
以前备份的Javascript配置文件不存在或有错误。
She's a dead ringer for a girl I used to know.
她酷似以前我认识的一个女孩。
She rinsed her hands quickly before eating.
她吃东西以前很快洗了一下手。
Put out all fires before leaving the camping ground.
离开宿营地以前要熄灭所有的火。
This story is about people anterior to the flood.
这个故事是关于洪水时期以前的人们的。
erstwhile是什么意思：
adj. 以前的
adv. 从前
