I need some time to mull it over before making a decision.

在作出决定之前我需要一些时间来认真琢磨一下。

《牛津词典》

I need some time to fall asleep.

我需要一些时间睡着。

youdao

I need some time off.

我需要休息一段时间。

《牛津词典》

I need some time alone.

我想一个人静一静。

I need 课堂 - SpeakingMax英语口语达人

My biggest immediate challenge is that I need some down time.

FORBES: Focused On A Mission

"I'll need for some time to be able to take this in, " Shiffrin, who did not finish Wednesday's giant slalom, told reporters.

CNN: U.S. teen Shiffrin slaloms to first World Cup victory

So just to pick up on one point of perhaps disagreement, I would say that the thing that we need to be focused on, and I hope we will spend some serious time talking about it tonight is, what are the dynamics at work in this world?

CENTERFORSECURITYPOLICY: Gaffney debates on Hugh Hewitt show