[ʃʊə(r)]，谐音: 嘘额

adj. 确信的可靠的必定的

adv. 当然的确'I'm not sure，' she responded.

“我不肯定。”她答道。

Are you sure you should be up?

你肯定你该起床了吗?

I'm sure we'll manage without.

我相信我们能凑合的。

I'm pretty sure I'll be going.

我相当肯定会去的。

I'm damn sure she had no idea.

我敢肯定她不知道。