Cool MateCertainly 对比 Undoubtedly
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
Undoubtedly
正式前 5000（相当常见）C1adverb
最正式: Undoubtedly最常见: Certainly
| Certainly | Undoubtedly | |
|---|---|---|
| 发音 | 🇬🇧 /["/ˈsɜːtnli/"]/🇺🇸 /["/ˈsɜːrtnli/"]/ | 🇬🇧 //ʌnˈdaʊtɪdli//🇺🇸 //ʌnˈdaʊtədli// |
| 含义 | 肯定；一定。Definitely; for sure. | 肯定；毫无疑问。Definitely; without a doubt. |
| 例句 | Without treatment, she will **almost certainly** die. | She is undoubtedly the best candidate for the position. |
| 语域 | 中性 | 正式 |
| 常见程度 | 前 1000（非常常见） | 前 5000（相当常见） |
| CEFR 等级 | A2 | C1 |
| 词性 | adverb | adverb |
| 搭配 | certainly agree, certainly possible, certainly not, certainly true, certainly yes | undoubtedly true, undoubtedly clear, undoubtedly helpful |
| 反义 | uncertainly, doubtfully | 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. | Confused with 'undoubtably', which is incorrect., Omitting it when certainty is implied., Using it in informal contexts where 'definitely' is more suitable. |
| 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. | 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. |
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常见问题：Certainly 对比 Undoubtedly
Certainly和Undoubtedly 有什么区别？
Certainly: Definitely; for sure. Undoubtedly: Definitely; without a doubt.
哪个更正式：Certainly和Undoubtedly？
Undoubtedly 是其中最正式的。
哪个更常见：Certainly和Undoubtedly？
Certainly 在日常英语中最常见。
哪个更高级：Certainly和Undoubtedly？
Undoubtedly 级别最高，在 CEFR 量表上为 C1。
Certainly和Undoubtedly 的 CEFR 等级相同吗？
在 CEFR 量表上：Certainly: A2, Undoubtedly: C1。
Certainly和Undoubtedly 是什么词性？
Certainly: adverb, Undoubtedly: adverb.
能各给一个例子吗？
Certainly: Without treatment, she will **almost certainly** die. Undoubtedly: She is undoubtedly the best candidate for the position.
我可以互换使用 Certainly和Undoubtedly 吗？
不总是。Certainly和Undoubtedly 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。