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 you locked the front door?

你确定锁前门了吗？

《柯林斯英汉双解大词典》

Make sure you defrost the chicken completely before cooking.

一定让冻鸡化透后再烹调。

《牛津词典》

I wanted to be sure you were not like your father.

VOA: special.2010.06.26

OK, important -- if you are part of this group here think about it and make sure you understand that.

好的，这很重要，如果刚才你选了可逆过程,请好好想想并且保证已经理解了这个问题。

麻省理工公开课 - 热力学与动力学课程节选

You just got to be looking around all the time to make sure you are not going to be run down.

你随时观察四周以确保你不会被撞倒。

伦敦的蓝色自行车 - SpeakingMax英语口语达人

One easy precaution is to make sure you know where your oysters come from.

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And finally, make sure you get your beauty sleep in before you hit the town.

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Upon arrival make sure you join the queue for a delectable country-style bacon and egg roll.

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