How To Know If Contact Is Inside Out

Recently one of my friends told me that there is distinct difference between 'know of something' and 'know about something' expressions. 'know of' is used when you have personal experience with wha...

"Know about" vs. "know of" - English Language & Usage Stack Exchange

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Possibly, "I do know that" can in fact only be used, when, you are answering the question of whether or not you know the issue at hand (or your knowledge has been called in to question, and you are answering that challenge). Let's say "out of the blue" you wanted to state that "you know that" -- and you wanted an emphatic version.

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Recently, I talked to a native speaker about the proper usage of the word “kindly”. I frequently use phrases like “kindly let us know whether you agree with the suggested approach” in business let...

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Examples: I know (about) this difficulty/problem. I know (about) Engineering. In the first sentence, it seems to me that "to know" expresses that the speaker experienced the problem/difficulty before while "to know about" only expresses that the speaker has heard or read about it.

to know vs to know about - English Language & Usage Stack Exchange

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My question is about similar (for me) question forms "don't I know you" and "do I know you". Is there any difference between them or can they both be used in the same context without any exceptions?

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Earth is the only planet we know of where life exists. This sentence is from the commentary of Planet Earth. Why it is know of in this sentence? Can it be know about? What’s the difference bet...