Cool MateInstantly vs We must go at once
When to use each in English, with meaning, register, and examples.
Instantly
Top 5,000 (fairly common)B2adverb
We must go at once
Top 2,000 (common)
Most common: We must go at once
| Instantly | We must go at once | |
|---|---|---|
| Pronunciation | 🇬🇧 /["/ˈɪnstəntli/"]/🇺🇸 /["/ˈɪnstəntli/"]/ | 🇬🇧 //wiː mʌst ɡoʊ æt wʌns//🇺🇸 //wi mʌst ɡoʊ æt wʌns// |
| Meaning | Right away, without waiting. | We need to leave immediately. |
| Example | Her voice is instantly recognizable. | We must go at once if we want to catch the train. |
| Register | Neutral | Neutral |
| How common | Top 5,000 (fairly common) | Top 2,000 (common) |
| CEFR level | B2 | - |
| Part of speech | adverb | |
| Collocations | instantly available, instantly recognizable, instantly regret, instantly noticeable | go at once, must go, leave at once |
| Antonyms | gradually, slowly, eventually | - |
| Common mistakes | 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. | Confused with 'at once' vs 'right away', Using 'we must go at once' in casual contexts where simpler phrases suffice, Overusing the phrase in non-urgent situations |
| Usage notes | 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. | Use this phrase to express urgency. It's appropriate in both spoken and written contexts, especially when time is a factor. |
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Frequently asked questions: Instantly vs We must go at once
What's the difference between Instantly and We must go at once?
Instantly: Right away, without waiting. We must go at once: We need to leave immediately.
Which is more common: Instantly and We must go at once?
We must go at once is the most common in everyday English.
Can you show an example of each?
Instantly: Her voice is instantly recognizable. We must go at once: We must go at once if we want to catch the train.
Can I use Instantly and We must go at once interchangeably?
Not always. Instantly and We must go at once 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.