现在，我想知道你是否曾经独立工作过。

Now, I'd like to know whether you've ever worked independently.

youdao

首先，他们必须搞清楚火星上是否曾经存在过生命。

To begin with, they will have to find out whether life has ever existed on the planet of Mars in the past.

youdao

仍无法确定他是否曾经较强地控制过真正的经济力量。

It is arguable whether he ever had much control over the real economic power.

《柯林斯英汉双解大词典》

He wants to know if they are the same men who so callously broke their father's heart by selling Joseph, his father's favorite, so many years ago.

他想知道他们是否还是老样子,就像他们曾经卖了约瑟夫，伤了他们父亲的心，多年前，约瑟夫最受父亲宠爱。

耶鲁公开课 - 旧约导论课程节选

I don't care if you ever go to church, that is no longer confined to a religious organization.

我不管你们是否曾经去过教堂,这已经不再是限制在某个宗教组织内的事了

耶鲁公开课 - 古希腊历史简介课程节选

Gee, have you ever wondered how they know the composition of stars that are light-years away?

嘿！你曾经是否想过,他们是怎么知道那些离我们好几光年远的,星星的位置的？

麻省理工公开课 - 固态化学导论课程节选