Cool MateImmediately vs Instantly vs Right away vs We must go at once
When to use each in English, with meaning, register, and examples.
Immediately
Instantly
Right away
We must go at once
| Immediately | Instantly | Right away | We must go at once | |
|---|---|---|---|---|
| Pronunciation | 🇬🇧 /["/ɪˈmiːdiətli/"]/🇺🇸 /["/ɪˈmiːdiətli/"]/ | 🇬🇧 /["/ˈɪnstəntli/"]/🇺🇸 /["/ˈɪnstəntli/"]/ | 🇬🇧 //raɪt əˈweɪ//🇺🇸 //raɪt əˈweɪ// | 🇬🇧 //wiː mʌst ɡoʊ æt wʌns//🇺🇸 //wi mʌst ɡoʊ æt wʌns// |
| Meaning | right away, without waiting | Right away, without waiting. | Immediately or without delay | We need to leave immediately. |
| Example | He answered the question immediately after it was asked. | Her voice is instantly recognizable. | Please send the report right away. | We must go at once if we want to catch the train. |
| Register | Neutral | Neutral | Neutral | Neutral |
| How common | Top 1,000 (very common) | Top 5,000 (fairly common) | Top 2,000 (common) | Top 2,000 (common) |
| CEFR level | A2 | B2 | - | - |
| Part of speech | adverb | adverb | ||
| Collocations | respond immediately, act immediately, notify immediately | instantly available, instantly recognizable, instantly regret, instantly noticeable | act right away, respond right away, call right away | go at once, must go, leave at once |
| Antonyms | eventually, later | gradually, slowly, eventually | - | - |
| Common mistakes | Using 'immediate' instead of 'immediately'., Confusing with 'eventually', which means later., Incorrectly placing 'immediately' at the end of a sentence. | 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. | Using 'right away' in a formal context where a more formal phrase is needed., Confusing it with 'right of way,' which means priority in traffic., Using it without a verb, as it normally needs context. | 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 'immediately' to emphasize urgency or promptness. It's appropriate in both spoken and written English, but avoid in very casual contexts. | 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. | Typically used in both written and spoken English to indicate urgency. Can be polite or direct depending on context. | 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: Immediately vs Instantly vs Right away vs We must go at once
What's the difference between Immediately, Instantly, Right away, and We must go at once?
Immediately: right away, without waiting Instantly: Right away, without waiting. Right away: Immediately or without delay We must go at once: We need to leave immediately.
Which is more common: Immediately, Instantly, Right away, and We must go at once?
Immediately is the most common in everyday English.
Which is more advanced: Immediately, Instantly, Right away, and We must go at once?
Instantly is the highest level, at B2, on the CEFR scale.
Can you show an example of each?
Immediately: He answered the question immediately after it was asked. Instantly: Her voice is instantly recognizable. Right away: Please send the report right away. We must go at once: We must go at once if we want to catch the train.
Can I use Immediately, Instantly, Right away, and We must go at once interchangeably?
Not always. Immediately, Instantly, Right away, 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.