Certainly

肯定───sure;可以───sure

Make sure the stamp is properly glued to the envelope.───务必把邮票在信封上贴好.

There's something odd about the way that fellow is behaving . I am sure he's up to no good.───那个人形迹可疑,肯定要做坏事.

To be sure, it is no longer winter; neverthless, it is quite cold.───现在固然已不是冬天了, 可是天气还是相当冷.

I would like to do it with you, but I am not sure whether my parents permit.───我愿意和你一起做, 但不知我父母是否允许.

She's been very depressed recently, but I'm sure she'll soon pull out of it.───她近来一直很抑郁, 但我相信不久她就会振作起来的.

I felt sure I would never be able to close the case again.───我肯定没有办法再把箱子关上了.

Be sure to give your family my regards.───一定要代我向你的家人问好.

Are you sure you want him as your partner for life?───你决定要他做你的终生伴侣 吗 ?

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I'm not sure what he is thinking about.

He who fears being conquered is sure of defeat.Napoleon Bonaparte

I'm sure he needs no introduction.

I'm sure he'll come with a bit of persuading.