Cool MateAll of a sudden vs Suddenly
When to use each in English, with meaning, register, and examples.
All of a sudden
Top 2,000 (common)
Suddenly
Top 1,000 (very common)A2adverb
Most common: Suddenly
| All of a sudden | Suddenly | |
|---|---|---|
| Pronunciation | 🇬🇧 //ɔːl əv ə ˈsʌdən//🇺🇸 //ɔl əv ə ˈsʌdən// | 🇬🇧 /["/ˈsʌdənli/"]/🇺🇸 /["/ˈsʌdənli/"]/ |
| Meaning | Unexpectedly or very quickly. | Happening quickly and without warning |
| Example | All of a sudden, it started to rain heavily. | I **suddenly realized** what I had to do. |
| Register | Neutral | Neutral |
| How common | Top 2,000 (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 | suddenly appear, suddenly realize, suddenly stop, suddenly change |
| Antonyms | gradually, slowly, over time | gradually, slowly |
| Common mistakes | Using in overly formal contexts., Confusing with similar phrases like 'suddenly.', Omitting 'of' in the phrase. | 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. | 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 Suddenly
What's the difference between All of a sudden and Suddenly?
All of a sudden: Unexpectedly or very quickly. Suddenly: Happening quickly and without warning
Which is more common: All of a sudden 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. Suddenly: I **suddenly realized** what I had to do.
Can I use All of a sudden and Suddenly interchangeably?
Not always. All of a sudden 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.