You don't have to knock—just walk in.

不必敲门—进来就是了。

《牛津词典》

You don't have to worry on that score.

那件事你不必担心。

《牛津词典》

You don't have to feel bad about relaxing.

你不必因为放松而感到内疚。

《柯林斯英汉双解大词典》

You don't have to be a VIP celebrity." Some experts say famous people may bring public awareness to an issue.

VOA: special.2009.05.08

When you don't have to worry about criteria like that ordinary, mechanical energy rules supreme, and that's dictating where equilibrium lies.

如果你不担心像这样的要求,通常的机械能就占据主要地位，并且决定平衡位于何处。

麻省理工公开课 - 热力学与动力学课程节选

So usually, I don't have to do much more than google, and turn in the first sentence and sure enough,

所以，我经常谷歌，输进第一句话，然后非常确信，

对于抄袭的想法 - SpeakingMax英语口语达人

We made a lot of profit over the last six months and we don't have to sell.

BBC: Berbatov not for sale, says Jol

We don't have to settle for 23 million people struggling to find a good job.

WHITEHOUSE: The White House

That, in turn, means the heirs don't have to "spend" their own exemptions on those assets.

WSJ: Tax Report: Dynasty Trusts Under Attack