From the day you arrive at my house, you need not spend a single penny.

从你到我家的那一天起，你就分文不需花了。

《柯林斯英汉双解大词典》

You need not feel obliged to contribute.

你不必认为你非得捐款。

《柯林斯英汉双解大词典》

You need not be sorry for her.

你们不必为她难过。

youdao

You need that immediacy of feedback, and we're not convinced that that can happen across an Internet connection.

VOA: special.2011.04.21

And you, you need not to be so ethically imperialist that you can't work with us to open up again the canon if you will of rights in the way we talk about it and to incorporate our perspectives."

而你们呢，你们需要摒弃,那种道德帝国主义态度，也就是,你们不愿跟我们合作,不愿敞开心扉,用我们的方式去理解人权,从我们的角度去看这个问题“

普林斯顿公开课 - 人性课程节选

Or "you need to do something" or "you need not to do something".

或者“你应该做某事”或“你不应该做某事”。

I'm sure 课堂 - SpeakingMax英语口语达人

To articulate that you need not facts, but perspective to put those facts into context.

FORBES: How Obama and Romney Should Prep for Tonight's Debate - and How You as a Leader Should Prep for Yours

For the best nuclear safety you need not just good planning and good engineering.

ECONOMIST: Japan's hydra-headed disaster

You need not have done anything wrong to be deemed unfit for these privileges.

CENTERFORSECURITYPOLICY: The Grand Deflection