No - I don't know what the 26th brightest star in the constellation of Rigel is called. That's a known unknown (to me). A question I know has an answer, which answer I do not know. But OP is …

Can anyone give use cases and examples for Happen to know Came to know Got to know Came across I always gets confused in their uses.

I primarily want to know which of "are" or "is" is the appropriate verb. My hunch is that "you or somebody you know" can be substituted by a plural pronoun, which makes the verb "are"; but …

For those of us not familiar, the verb to know once had an archaic sexual sense, often found in the Old Testament, and as illustrated in the following story found in Genesis 19: 4 But before they...

If someone has stated that they don't know something, and you are stating you don't know that same something, you would would use "I don't know either." The only situation where "I also …

I don't know exactly what a double-positive makes a negative means, but I don't think I agree with it. Nor do you, judging by the next sentence.

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 …

For me, know implies knowledge of details or individual pieces, while am aware of implies a knowledge only of a whole. Using your example, knowing my rights means that I know I have …

Therefore, saying "did you know" asks if you have previously known something. "Do" is the present tense, so saying "do you know" would ask if you currently know.

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 …