/ʃɔ:(r); US ʃʊər ||; ʃυr/adj adv1 (not before a noun 不用于名词前) having no doubt about sth; certain 肯定；有把握: You must be sure of your facts before you make an accusation. 提出指责之前必须先弄清事实。I'm not sure what to do next. 我不敢肯定接下来该怎么办。Craig was sure that he'd made the right decision. 克雷格深信自己作出了正确的决定。I think I had my bag when I got off the bus but I'm not sure. 我觉得我下车时是带着提包的，但我不敢肯定。
2 (not before a noun 不用于名词前) sure of sth;sure to do sth that you will definitely get or do, or that will definitely happen 必定获得、做或发生: If you go and see them you can be sure of a warm welcome. 如果你去探望他们，你肯定会受到热烈欢迎。If you work hard you are sure to pass the exam. 如果你肯用功，考试一定及格。 [OPP] unsure 反义词为unsure
3 that you can be certain of 包管: A noise like that is a sure sign of engine trouble. 发出那种噪音包管是发动机有毛病的迹象。
4 (informal 非正式) used to say ‘yes’ to sb （用于作肯定回答）可以，好: ‘Can I have a look at your newspaper?’ ‘Sure.’ “我看一下你的报纸可以吗？”“可以。”
Be sure to do sth Don't forget to do sth 不要忘记做某事:
Be sure to write and tell me what happens. 别忘了来信告诉我那边的事。 for sure without doubt 肯定；毫无疑问:
Nobody knows for sure what happened. 没有人确切知道出了什么事。 make sure 1 to find out whether sth is in a particular state or has been done 确定；查明: I must go back and make sure I closed the window. 我必须回去看看我有没有关上窗户。
2 to take the action that is necessary 确保: Make sure you are back home by 11 o'clock. 你一定要在11点之前回家。
sure enough as was expected 一如所料:
I expected him to be early, and sure enough he arrived five minutes before the others. 我预计他会早些来，果然他比别人早到五分钟。 sure of yourself confident about your opinions, or about what you can do 有信心；自信
sure (thing) (
US 美) (
informal 非正式) yes 可以；好:
‘Can I borrow this book?’ ‘Sure thing.’ “我可以借这本书吗？”“可以。”