As soon as possible vs Immediately vs Quickly

When to use each in English, with meaning, register, and examples.

As soon as possible

Top 2,000 (common)

Immediately

Top 1,000 (very common)A2adverb

Quickly

Top 1,000 (very common)A1adverb
 As soon as possibleImmediatelyQuickly
Pronunciation🇬🇧 //æz suːn æz ˈpɒsəbl//🇺🇸 //æz suːn æz ˈpɑːsəbl//🇬🇧 /["/ɪˈmiːdiətli/"]/🇺🇸 /["/ɪˈmiːdiətli/"]/🇬🇧 /["/ˈkwɪkli/"]/🇺🇸 /["/ˈkwɪkli/"]/
MeaningDo something quickly or without delay.right away, without waitingIn a fast manner
ExamplePlease submit your report as soon as possible so we can review it.He answered the question immediately after it was asked.She ran quickly to catch the bus.
RegisterNeutralNeutralNeutral
How commonTop 2,000 (common)Top 1,000 (very common)Top 1,000 (very common)
CEFR level-A2A1
Part of speechadverbadverb
Collocationssend information as soon as possible, complete the task as soon as possible, respond as soon as possiblerespond immediately, act immediately, notify immediatelymove quickly, react quickly, think quickly
Antonyms-eventually, laterslowly
Common mistakesOmitting 'as' and saying 'soon possible'., Using in overly casual situations., Translating directly into other languages leading to awkward phrasing.Using 'immediate' instead of 'immediately'., Confusing with 'eventually', which means later., Incorrectly placing 'immediately' at the end of a sentence.Using 'quick' instead of 'quickly' when modifying a verb., Placing 'quickly' too far from the verb it modifies., Confusing 'quickly' with 'fastly' since 'fast' is the correct adverb.
Usage notesCommonly used in both spoken and written English to indicate urgency; appropriate in both formal and informal contexts.Use 'immediately' to emphasize urgency or promptness. It's appropriate in both spoken and written English, but avoid in very casual contexts.Use 'quickly' when describing how something is done fast. Appropriate in both spoken and written English, but may be overly formal in casual conversations.

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As soon as possible
Immediately
Quickly

Frequently asked questions: As soon as possible vs Immediately vs Quickly

What's the difference between As soon as possible, Immediately, and Quickly?

As soon as possible: Do something quickly or without delay. Immediately: right away, without waiting Quickly: In a fast manner

Which is more advanced: As soon as possible, Immediately, and Quickly?

Immediately is the highest level, at A2, on the CEFR scale.

Can you show an example of each?

As soon as possible: Please submit your report as soon as possible so we can review it. Immediately: He answered the question immediately after it was asked. Quickly: She ran quickly to catch the bus.

Can I use As soon as possible, Immediately, and Quickly interchangeably?

Not always. As soon as possible, Immediately, and Quickly 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.