Of course vs You know her of course

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

Of course

Top 1,000 (very common)

You know her of course

Top 5,000 (fairly common)
Most common: Of course
 Of courseYou know her of course
Pronunciation🇬🇧 //əv kɔːs//🇺🇸 //əv kɔrs//🇬🇧 //juː nəʊ hɜːr əv kɔːs//🇺🇸 //juː noʊ hɜr əv kɔrs//
MeaningDefinitely, it's obvious.You are familiar with her, obviously.
ExampleAre you joining us for dinner tonight? Of course!You know her, of course, she’s your sister!
RegisterNeutralNeutral
How commonTop 1,000 (very common)Top 5,000 (fairly common)
Collocationsof course not, of course yes, of course you can, of course it isknow her well, know him, of course, you know them too
Common mistakesUsing it in formal writing where a different expression is needed., Confusing it with other affirmations like 'certainly' or 'definitely'.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 notesUsed in informal and formal situations to affirm something obvious. Avoid in highly formal writing.Used when confirming someone's familiarity with a person. Can be friendly or casual; avoid in formal writing.

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Of course
You know her of course

Frequently asked questions: Of course vs You know her of course

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

Of course: Definitely, it's obvious. You know her of course: You are familiar with her, obviously.

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

Of course is the most common in everyday English.

Can you show an example of each?

Of course: Are you joining us for dinner tonight? Of course! You know her of course: You know her, of course, she’s your sister!

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

Not always. Of course 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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