be sure of
collocation对…有把握，确信
I'm not sure of his exact address.
我不太确定他的确切地址。
确信的；有把握的；肯定的
surer — comparative of sure
先理解核心含义，再看它在真实句子里的用法。
确信的；有把握的；肯定的
Confident; having no doubt or uncertainty about something.
I'm sure we locked the door before we left.
我确定我们离开前锁了门。
物理上稳固可靠,不失败的。
Physically secure and certain, non-failing, reliable.
没有疑虑或不确定性；自信的
having or feeling no doubt or uncertainty; confident and assured
知识或信念上确定的。
Certain in one's knowledge or belief.
采取足够的谨慎以确保安全
exercising or taking care great enough to bring assurance
She is sure of her decision and won't change her mind.
她对自己的决定很有把握，不会改变主意。
AI contextual example
Are you sure about the time of the meeting?
你确定会议的时间吗？
AI contextual example
was sure (or certain) she had seen it
她确信自己见过它
WordNet
was very sure in his beliefs
他对自己的信念非常确信
WordNet
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对…有把握，确信
I'm not sure of his exact address.
我不太确定他的确切地址。
一定做，务必做
Be sure to lock the door before you leave.
离开前务必锁好门。
确保，查明
Make sure you turn off the lights before going to bed.
确保上床前关灯。
肯定，毫无疑问
He will win the race for sure.
他肯定会赢得比赛。
果然，不出所料
I thought it would rain, and sure enough it did.
我猜会下雨，果然下了。
…的明确标志
Dark clouds are a sure sign of an approaching storm.
乌云是暴风雨来临的明确标志。
肯定，毫无疑问
I'll be there for sure.
我肯定会去那里。
确保，确认
Make sure you lock the door before leaving.
离开前确保锁门。
当然，没问题
Can you help me with this? Sure thing!
你能帮我这个吗？当然可以！
歌曲《旧金山》歌词：请务必在头发上戴些花。
I am sure to remember that advice when I go to San Francisco.
我去旧金山时一定会记住这个建议。
电影《谋杀绿脚趾》台词：当然，没问题。
The Dude always says 'sure, no problem' to any request.
督爷总是对任何请求都说“当然，没问题”。
Use surer naturally, then get feedback on meaning, tone, grammar, and phrasing.
Revisit a common error or keep this word in your review list.
联想“舒尔”读音，想象舒服地点头说：“当然，我确定。”
“sure”作为形容词表示“确信的”时，语气中性，通常用于日常对话、表达观点或确认信息，口语中很常见。注意在正式书面语中可能更常用“certain”。
常与be动词连用，后接不定式、介词短语或that从句；make sure表示确保。
Dictionary facts from DICTIONARY_API_DEV, ECDICT, WIKTIONARY.