例句：
Previous to this, she'd always been well.
這以前，她身體一向很好。
This erstwhile schoolmaster had discovered a way of keeping us quiet in the evenings.
這位往昔的老師找到了一種讓我們晚上安靜下來的方法。
We were delighted to discover a new community garden where erstwhile had been a trash-filled vacant lot.
我們很高興發現了一個新的花園社區，這個花園以前是一個填滿垃圾的地方。
They had some trouble once over a halter, and, both being good haters, there was bad blood between them.
他們兩人以前為了韁繩的事發生過一些齟齬，因為兩人都是記仇記恨的人，所以宿怨不能消解。
slough off former associates.
拋棄以前的同伴。
Ages anterior to the flood.
諾亞洪水以前的時代。
Apples are green when unripe.
蘋果在成熟以前是綠色的。
I used to be a cheerleader for a group of fans.
我以前是一群球迷的啦啦隊長。
The backup Javascript configuration file was absent or had errors.
以前備份的Javascript配置文件不存在或有錯誤。
She's a dead ringer for a girl I used to know.
她酷似以前我認識的一個女孩。
She rinsed her hands quickly before eating.
她吃東西以前很快洗了一下手。
Put out all fires before leaving the camping ground.
離開宿營地以前要熄滅所有的火。
This story is about people anterior to the flood.
這個故事是關于洪水時期以前的人們的。
erstwhile是什么意思：
adj. 以前的
adv. 從前