To know something is more long-term, perhaps after having realized it. The first definition for know is: to perceive or understand as fact or truth; to apprehend clearly and with certainty …

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 …

Feb 25, 2012 · What is the correct usage of phrase "you don't know what you don't know"? Can it be used in formal conversation/writing?

Feb 28, 2016 · Can you tell which of the following sentences are right? And explain why the others are wrong? No one knows the answer. No one know the answer. There is nobody …

Jul 18, 2017 · My business partner, who is a Native English speaker, used "know on" in the email. The sentence is: Now they has found out the reason why they kept asking for the delay, it …

Oct 14, 2011 · But there are also unknown unknowns – the ones we don't know we don't know. "Known unknown" implies there are things we know we don't know, while "unknown known" …

Sep 25, 2010 · Have you ever had a case where you felt compelled to include strange things like a double that in a sentence? If so, then what did you do to resolve this? For me, I never knew …

Jan 5, 2012 · I am a non-native speaker of English. When communicating with a professor, would it be better to use could you kindly send me the document or could you please send me the …

Oct 18, 2016 · Should I use "did you know" or "do you know" to introduce a fact? I've only seen "did you know" in action. My logical deduction is that before the "question" (which is not much …

Apr 18, 2012 · Sometimes (well, often) people pretend not to understand what's going on (or pretend not to understand what the other person means, etc.) when in fact they do perfectly …