What do you need your own computer for? You can use ours.

你干吗还要自己买电脑？你可以用我们的。

《牛津词典》

But you have short hair! What do you need a hairband for?

但你是短头发！你需要发带做什么？

youdao

What do you need for that object?

你需要什么来做那个物体？

youdao

- I like this one.- JESSICA: Yeah, I like the beading, - and you wouldn't need jewelry.- Jess, what do you think? Lavender?

VOA: standard.other

So if you want to do well in 1504-- you'll know what you need to do, right?

如果各位想学好1504这门课-,你们知道该怎么做了，是吗？

哈佛公开课 - 幸福课课程节选

And also be well-informed as to what you need to do and the steps you need to take

对于你要做什么，要采取什么步骤，你都要保持消息灵通，

想成为明星吗？ - SpeakingMax英语口语达人

We hope you'll seriously turn things around- you know what you need to do.

ENGADGET: TiVo Deathwatch

Vote.barackobama.com, and there you can find out everything you need -- all the dates, where you need to go, what you need to do to make sure your voices are heard on Election Day.

WHITEHOUSE: Remarks by the First Lady at a Campaign Event -- Reno, NV

Raising exactly what you expect to need to do the right set of value-creating steps (no more, no less) is a tricky balance between fear and greed.

FORBES: The Energetics of Fear and Greed in the Boardroom