音标：英式 [ˈsɜːt(ə)nli]，美式 [ˈsɜːrt(ə)nli]
词性：副词（adverb）
表示“无疑地”“确定地”“当然”，强调对事实的肯定或同意请求。作为CET4与TEM4级别核心词汇，广泛用于日常对话、学术写作及考试场景（如雅思、托福）。
用于陈述句中，加强语气，表“确实”“无疑”。
位置：通常置于动词前或句首，有时也可放句尾强调。
例句：
She certainly deserved the award.（她确实配得上这个奖项。）
The public is certainly getting tired of hearing about it.（公众当然已经听腻了这件事。）
单独使用或回应问题，表“当然”“没问题”。
例句：
"Can you help me?" "Certainly."（“你能帮我吗？”“当然可以。”）
"In any case you remained friends." "Certainly."（“无论如何，你们还是朋友吧。”“那当然。”）
与否定词搭配，构成 certainly not，表“当然不”“绝对不行”。
例句：
"Perhaps I should withdraw." "Certainly not!"（“也许我该退出。”“当然不行！”）
| 搭配结构 | 含义 | 例句 |
|---|---|---|
| certainly not | 当然不 | "Do you agree?" "Certainly not!" |
| almost certainly | 几乎肯定 | The project will almost certainly succeed. |
| certainly will | 一定会 | They will certainly come tomorrow. |
| certainly true | 确实如此 | Her statement is certainly true. |
同义词：definitely, indeed, of course, unquestionably
辨析：
certainly：强调有把握，深信不疑；
surely：表必然可能性或主观判断；
of course：更口语化，可与 certainly 互换。
Victory certainly belongs to the people.（胜利一定属于人民。）
They will certainly succeed.（他们一定会成功。）
I'll certainly be most discreet in my conversation.（我在谈话中当然会十分小心。）
You are certainly a talented artist.（你当然是位有天赋的艺术家。）
It's certainly a big improvement over yesterday.（肯定比昨天大有好转。）
If I were you, I certainly would join the team.（如果我是你，一定会加入这个团队。）
She is certainly the best candidate.（她绝对是最佳候选人。）
He'll certainly die if you don't call a doctor.（不马上叫医生，他肯定会死。）
The bombs are almost certainly part of a bigger conspiracy.（这些炸弹几乎肯定是更大阴谋的一部分。）
I can certainly help you with this problem.（我当然能帮你解决这个问题。）
避免过度使用：在非正式场合，可替换为 sure 或 of course，避免语气生硬。
写作多样性：可用同义词 definitely 或 unquestionably 替代，丰富表达。
掌握 certainly 的用法能提升语言准确性，但需根据语境灵活调整，避免刻板。你是否曾在对话中误用 certainly 导致语气不当？不妨结合今天的解析重新梳理场景。