Something ought to have been done before now.

先前就该采取措施了。

《牛津词典》

"This should have been decided long before now."—"We can't think of everything."

“这在此前早该定下了。”—“我们不可能事事都考虑。”

《柯林斯英汉双解大词典》

However, it has never been widely used before now.

然而，在此之前它从未被广泛使用。

youdao

Now he would have to deal with the problems that presidents before him had not been able to solve.

VOA: special.2009.05.07

Now you also may remember that we have already run into Spenser's Mammon before this point, before Paradise Lost.

现在你们可能也记得我们已经,在遇到《失乐园》之前就与斯潘塞的贪欲之神相遇了。

耶鲁公开课 - 弥尔顿课程节选

In fact, you could be sitting three years from now waiting before commencement and you can get that grade adjusted.

实际上，你可以从现在到知道毕业典礼前,一直坐等三年,你可以更正成绩。

麻省理工公开课 - 固态化学导论课程节选

Before now net phone firms have not been required to connect to emergency numbers.

BBC: RELATED BBC SITES

Mr. DANIEL SHAMASH: (Through translator) Before now there were all Christians, no Muslims at all.

NPR: Iraqi Christians Return to Church

Before now most CD owners had to rip the songs themselves to create digital versions.

BBC: Amazon AutoRip service gives out free digital copies of CDs