Cool MateCertainly 对比 Definitely 对比 Surely 对比 Undoubtedly 对比 Without a doubt
在英语中何时使用每一个，包含含义、语域和例句。
Certainly
前 1000（非常常见）A2adverb
Definitely
前 1000（非常常见）A2adverb
Surely
前 2000（常见）B1adverb
Undoubtedly
正式前 5000（相当常见）C1adverb
Without a doubt
前 2000（常见）
最正式: Undoubtedly
| Certainly | Definitely | Surely | Undoubtedly | Without a doubt | |
|---|---|---|---|---|---|
| 发音 | 🇬🇧 /["/ˈsɜːtnli/"]/🇺🇸 /["/ˈsɜːrtnli/"]/ | 🇬🇧 /["/ˈdefɪnətli/"]/🇺🇸 /["/ˈdefɪnətli/"]/ | 🇬🇧 /["/ˈʃʊəli//ˈʃɔːli/"]/🇺🇸 /["/ˈʃʊrli/"]/ | 🇬🇧 //ʌnˈdaʊtɪdli//🇺🇸 //ʌnˈdaʊtədli// | 🇬🇧 //wɪˈðaʊt ə daʊt//🇺🇸 //wɪˈðaʊt ə daʊt// |
| 含义 | 肯定；一定。Definitely; for sure. | 当然，毫无疑问For sure, without a doubt | 肯定；毫无疑问certainly; without a doubt | 肯定；毫无疑问。Definitely; without a doubt. | Definitely true; no question about it. |
| 例句 | Without treatment, she will **almost certainly** die. | I definitely remember sending the letter. | Surely we should do something about it? | She is undoubtedly the best candidate for the position. | She is, without a doubt, the most talented singer in the group. |
| 语域 | 中性 | 中性 | 中性 | 正式 | 中性 |
| 常见程度 | 前 1000（非常常见） | 前 1000（非常常见） | 前 2000（常见） | 前 5000（相当常见） | 前 2000（常见） |
| CEFR 等级 | A2 | A2 | B1 | C1 | - |
| 词性 | adverb | adverb | adverb | adverb | |
| 搭配 | certainly agree, certainly possible, certainly not, certainly true, certainly yes | definitely agree, definitely believe, definitely know | surely believe, surely know, surely must | undoubtedly true, undoubtedly clear, undoubtedly helpful | believe without a doubt, know without a doubt, say without a doubt |
| 反义 | uncertainly, doubtfully | doubtfully, uncertainly | doubtfully, unsure | doubtfully, questionably, uncertainly | - |
| 常见错误 | 'Certainly' is often incorrectly used in place of 'certain' in adjectives., Learners might confuse 'certainly' with 'definitely' without noticing the subtle nuance., Some learners use 'certainly' in inappropriate contexts, such as casual greetings. | Often confused with 'defiantly' which means resisting authority., Sometimes spelled incorrectly as 'definately'. | Confusing 'surely' with 'sure' — 'sure' can be an adjective., Using 'surely' as a response when a simple 'yes' would suffice., Omitting 'surely' in a sentence where it clarifies certainty. | Confused with 'undoubtably', which is incorrect., Omitting it when certainty is implied., Using it in informal contexts where 'definitely' is more suitable. | Used with incorrect verb forms (e.g., 'Without a doubt, he is the best.' should be 'Without a doubt, he is the best choice.'), Often confused with similar phrases like 'without question,' which can have a slightly different tone. |
| 用法说明 | 当你想强调肯定或同意时可以使用‘当然’。它比‘好’更正式，适合在专业场合使用，但在随意的对话中可能显得太强烈。Use 'certainly' when you want to emphasize affirmation or agreement. It is more formal than 'sure' and works well in professional settings, but might feel too strong in casual conversations. | 使用'肯定'来强调确定性。它在口语和书面英语中都很合适。避免在过于正式的场合使用，像'当然'这样的替代词可能更合适。Use 'definitely' to emphasize certainty. It fits well in both spoken and written English. Avoid using it in overly formal contexts where alternatives like 'certainly' might be more suitable. | 使用'当然'来表达确定性。它适用于口语和书面语，但在正式讨论中更常见。在非常随意的对话中，避免使用它，简单的词如'绝对'可能更合适。Use 'surely' to express certainty. It’s appropriate in both spoken and written contexts but is more common in formal discussions. Avoid using it in very casual conversations where simpler words like 'definitely' might fit better. | 用于强调确定性或强烈信念；通常在正式写作或演讲中使用，在日常对话中不常见。Used to emphasize certainty or strong belief; typically in formal writing or speeches, not common in casual conversation. | Used to express strong certainty. Suitable for both spoken and written forms. Avoid in overly formal contexts. |
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常见问题：Certainly 对比 Definitely 对比 Surely 对比 Undoubtedly 对比 Without a doubt
Certainly、Definitely、Surely、Undoubtedly和Without a doubt 有什么区别？
Certainly: Definitely; for sure. Definitely: For sure, without a doubt Surely: certainly; without a doubt Undoubtedly: Definitely; without a doubt. Without a doubt: Definitely true; no question about it.
哪个更正式：Certainly、Definitely、Surely、Undoubtedly和Without a doubt？
Undoubtedly 是其中最正式的。
哪个更高级：Certainly、Definitely、Surely、Undoubtedly和Without a doubt？
Undoubtedly 级别最高，在 CEFR 量表上为 C1。
能各给一个例子吗？
Certainly: Without treatment, she will **almost certainly** die. Definitely: I definitely remember sending the letter. Surely: Surely we should do something about it? Undoubtedly: She is undoubtedly the best candidate for the position. Without a doubt: She is, without a doubt, the most talented singer in the group.
我可以互换使用 Certainly、Definitely、Surely、Undoubtedly和Without a doubt 吗？
不总是。Certainly、Definitely、Surely、Undoubtedly和Without a doubt 相关，有时可以互换，但在语域、常见程度和用法上不同，所以换用可能改变意思或语气。替换前先看看上面的区别。