Surely vs You know her of course

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

Surely

Top 2,000 (common)B1adverb

You know her of course

Top 5,000 (fairly common)
Most common: Surely
 SurelyYou know her of course
Pronunciation🇬🇧 /["/ˈʃʊəli//ˈʃɔːli/"]/🇺🇸 /["/ˈʃʊrli/"]/🇬🇧 //juː nəʊ hɜːr əv kɔːs//🇺🇸 //juː noʊ hɜr əv kɔrs//
Meaningcertainly; without a doubtYou are familiar with her, obviously.
ExampleSurely we should do something about it?You know her, of course, she’s your sister!
RegisterNeutralNeutral
How commonTop 2,000 (common)Top 5,000 (fairly common)
CEFR levelB1-
Part of speechadverb
Collocationssurely believe, surely know, surely mustknow her well, know him, of course, you know them too
Antonymsdoubtfully, unsure-
Common mistakesConfusing 'surely' with 'sure' — 'sure' can be an adjective., Using 'surely' as a response when a simple 'yes' would suffice., Omitting 'surely' in a sentence where it clarifies certainty.Forgetting to use 'of course' for emphasis., Using 'you know her' without 'of course' can sound less confident., Confusing with similar phrases like 'you've met her'.
Usage notesUse 'surely' to express certainty. It’s appropriate in both spoken and written contexts but is more common in formal discussions. Avoid using it in very casual conversations where simpler words like 'definitely' might fit better.Used when confirming someone's familiarity with a person. Can be friendly or casual; avoid in formal writing.

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Surely
You know her of course

Frequently asked questions: Surely vs You know her of course

What's the difference between Surely and You know her of course?

Surely: certainly; without a doubt You know her of course: You are familiar with her, obviously.

Which is more common: Surely and You know her of course?

Surely is the most common in everyday English.

Can you show an example of each?

Surely: Surely we should do something about it? You know her of course: You know her, of course, she’s your sister!

Can I use Surely and You know her of course interchangeably?

Not always. Surely and You know her of course 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.

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