Are you sure you should be up?

你肯定你该起床了吗?

《柯林斯英汉双解大词典》

'Are you sure?' he asked her.

“你有把握吗？”他问她。

《牛津词典》

Are you sure about that?

这事你肯定吗？

《牛津词典》

"Bernstein, are you sure on this story?" "Absolutely."

VOA: special.2009.04.20

Are you sure you didn't want to do for i in range of list, rather than for i in list?

你真的打算这么做吗？你确定你不是,想在链表范围内定义i而不是定义链表i？

麻省理工公开课 - 计算机科学及编程导论课程节选

Are you sure? Is there nothing you want to say?

你确定？真的没有什么要说的吗？

Is there any 实战 - SpeakingMax英语口语达人

If you can do all that timing you sure don't need advice from me.

FORBES: Magazine Article

It's not politically correct to say, are you sure we need to spend that much?

NPR: Intelligence Failures In 'Top Secret America'

You might envy those short hours, but you sure would not envy her commute.

FORBES: Real Estate Professional Status - Becoming More Important - Very Hard To Prove