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...
Why do you think that He doesn't know him from his schooldays means that he does know him? It would only have that sense if you added something like In fact, he first met him at university.
Yahoo: Do I have the flu, COVID or RSV in California? What to know as viruses spread
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Influenza cases are rising sharply, heightening fears that a new strain will fuel a punishing flu season that is already outpacing last year’s. Photo: Brendan McDermid/Reuters If everyone you know ...
Flu pediatric deaths have doubled week-over-week, according to new Centers for Disease Control and Prevention data, despite influenza numbers continuing on a downward trend overall. Fifteen new ...
"Know about" vs. "know of" - English Language & Usage Stack Exchange
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.