Cool MateAll of a sudden vs Next thing you know vs Suddenly
When to use each in English, with meaning, register, and examples.
All of a sudden
Next thing you know
Suddenly
| All of a sudden | Next thing you know | Suddenly | |
|---|---|---|---|
| Pronunciation | 🇬🇧 //ɔːl əv ə ˈsʌdən//🇺🇸 //ɔl əv ə ˈsʌdən// | 🇬🇧 //nɛkst θɪŋ jə nəʊ//🇺🇸 //nɛkst θɪŋ jə noʊ// | 🇬🇧 /["/ˈsʌdənli/"]/🇺🇸 /["/ˈsʌdənli/"]/ |
| Meaning | Unexpectedly or very quickly. | Then something happens quickly or unexpectedly. | Happening quickly and without warning |
| Example | All of a sudden, it started to rain heavily. | I was watching TV, and the next thing you know, it's midnight! | I **suddenly realized** what I had to do. |
| Register | Neutral | Informal | Neutral |
| How common | Top 2,000 (common) | Top 3,000 (common) | Top 1,000 (very common) |
| CEFR level | - | - | A2 |
| Part of speech | adverb | ||
| Collocations | all of a sudden, a loud noise, all of a sudden, they appeared, all of a sudden, it happened | and the next thing you know, next thing you know, it's, before you know it, the next thing you know | suddenly appear, suddenly realize, suddenly stop, suddenly change |
| Antonyms | gradually, slowly, over time | previously, earlier, beforehand, last thing you realize | gradually, slowly |
| Common mistakes | Using in overly formal contexts., Confusing with similar phrases like 'suddenly.', Omitting 'of' in the phrase. | Using it in a formal context., Confusing it with 'next thing,' which is less specific., Overusing it in conversations. | Using 'suddenly' with the wrong tense (e.g., 'sudden' for past actions)., Confusing 'suddenly' with 'sudden', forgetting it needs to modify verbs., Using 'suddenly' too often, making writing sound repetitive. |
| Usage notes | Used to describe a change that happens suddenly. Suitable for both spoken and written English; avoid in formal writing. | Used in casual conversation to describe a sudden change or event. Not suitable for formal writing. | Use 'suddenly' to describe an unexpected change or event. Commonly used in storytelling or descriptions of surprising moments. Avoid in very formal contexts. |
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Frequently asked questions: All of a sudden vs Next thing you know vs Suddenly
What's the difference between All of a sudden, Next thing you know, and Suddenly?
All of a sudden: Unexpectedly or very quickly. Next thing you know: Then something happens quickly or unexpectedly. Suddenly: Happening quickly and without warning
Which is more common: All of a sudden, Next thing you know, and Suddenly?
Suddenly is the most common in everyday English.
Can you show an example of each?
All of a sudden: All of a sudden, it started to rain heavily. Next thing you know: I was watching TV, and the next thing you know, it's midnight! Suddenly: I **suddenly realized** what I had to do.
Can I use All of a sudden, Next thing you know, and Suddenly interchangeably?
Not always. All of a sudden, Next thing you know, and Suddenly are related and overlap in some contexts, but they differ in register, how common they are, and usage, so swapping one for another can change the meaning or tone. Check the differences above before substituting.