She was very helpful when my mother was ill—I'll allow you that.

我母亲生病时她帮了很大的忙—我同意你说的这一点。

《牛津词典》

It might be helpful when you get used to making a to do list of all your schoolwork, and checking each item off when it is completed.

养成给所有要做的作业列任务清单的习惯，并在完成每一项后划掉，这点或许很有帮助。

youdao

What activities are most helpful when depression worsens?

当抑郁症恶化的时候、有什么样的活动会有帮助？

youdao

It is always helpful when people keep their nose out of other people's business.

VOA: special.2009.09.13

If you're getting these compilation errors, well, -- when you compile, notice there's a number of key help -- the number of helpful tidbits here.

如果你们得到了这些编译错误，当你编译的时候，注意这里有很多关键帮助-,这里很多帮助信息。

哈佛公开课 - 计算机科学课程节选

What do you wish you had learned when you were in school that would have been really helpful to you during your tenure in Microsoft?

你希望自己能从学校学到什么,对你以后在微软的工作是有帮助的？

斯坦福公开课 - 微软CEO-Steve.Ballmer谈科技的未来课程节选

Good luck and good timing is also helpful when creating vast fortunes from scratch.

FORBES: Magazine Article

But this kind of activity is never helpful when it comes to peace negotiations.

WHITEHOUSE: President Obama and President Yudhoyono Press Availability | The White House

These can be especially helpful when opportunities or forks in the road present themselves.

FORBES: Marissa Mayer: Are The Rest Of Us Shooting Too Low?