以前从不曾发生这种事情。

It had never happened before.

youdao

看到你吸烟我感到很惊奇，你以前从不抽烟的。

I'm surprised to see you smoking. You never used to.

youdao

有这样一个庞大的群体，Nike正研究着我们以前从不了解的东西。

With such a huge group, Nike is learning things we've never known before.

youdao

Actually the City of Corinth wouldn't have been taxed because it was a Roman colony, and one of the benefits of being a Roman colony is that you didn't have to pay taxes, or at least the citizens didn't have to pay taxes.

事实上科林斯城以前从不收税,因为它是罗马的殖民地，成为罗马殖民地的一个好处是,不必交税，或者至少公民不用付。

耶鲁公开课 - 新约课程节选