Cool MateAll of a sudden vs Instantly
When to use each in English, with meaning, register, and examples.
All of a sudden
Top 2,000 (common)
Instantly
Top 5,000 (fairly common)B2adverb
Most common: All of a sudden
| All of a sudden | Instantly | |
|---|---|---|
| Pronunciation | 🇬🇧 //ɔːl əv ə ˈsʌdən//🇺🇸 //ɔl əv ə ˈsʌdən// | 🇬🇧 /["/ˈɪnstəntli/"]/🇺🇸 /["/ˈɪnstəntli/"]/ |
| Meaning | Unexpectedly or very quickly. | Right away, without waiting. |
| Example | All of a sudden, it started to rain heavily. | Her voice is instantly recognizable. |
| Register | Neutral | Neutral |
| How common | Top 2,000 (common) | Top 5,000 (fairly common) |
| CEFR level | - | B2 |
| Part of speech | adverb | |
| Collocations | all of a sudden, a loud noise, all of a sudden, they appeared, all of a sudden, it happened | instantly available, instantly recognizable, instantly regret, instantly noticeable |
| Antonyms | gradually, slowly, over time | gradually, slowly, eventually |
| Common mistakes | Using in overly formal contexts., Confusing with similar phrases like 'suddenly.', Omitting 'of' in the phrase. | Using 'instantly' with past tense incorrectly, e.g., 'I instantly saw' instead of 'I saw instantly'., Confusing it with 'immediately' when the emphasis on speed differs., Forgetting to use it with an action verb. |
| Usage notes | Used to describe a change that happens suddenly. Suitable for both spoken and written English; avoid in formal writing. | Use 'instantly' in both spoken and written English to emphasize immediate action. It's appropriate in most contexts but less common in very casual conversations. |
See it in real clips
Frequently asked questions: All of a sudden vs Instantly
What's the difference between All of a sudden and Instantly?
All of a sudden: Unexpectedly or very quickly. Instantly: Right away, without waiting.
Which is more common: All of a sudden and Instantly?
All of a sudden 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. Instantly: Her voice is instantly recognizable.
Can I use All of a sudden and Instantly interchangeably?
Not always. All of a sudden and Instantly 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.