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...
If you know about a subject, you have studied it or taken an interest in it, and understand part or all of it. Hire someone with experience, someone who knows about real estate.
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.
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.
For a non-native speaker like me, I am always wondering how to use you know correctly, as in the following sentence: Alright, well, for example, like on Saturdays, y’know, what I liked to do ...
Thus, "As far as I know, Bob is happy" over "Bob is happy, so far as I know". They are equivalent in meaning therefore, but choice of one over another betrays, for me, certain prejudices. I also sense that "so far as" sounds slightly antiquated and is losing ground.
In this instance, I believe he did know nothing at all about those sinister schemes. So, is it just a figure of speech to express that some poor soul should have known?
In my understanding, ' as we know it ' usually follows a noun phrase and means like The building as we know it = the version/condition of the building we know now. First, I'm not sure about its grammar. Is the 'as' a conjunction? Is it correct to think that 'it' changes to 'them'? E.g., the buildings as we know them Second, a question about its use. Is it possible to use when the preceding ...
It's not just you that doesn't know. Now, according to owl.purdue.edu, we should use "doesn't" when the subject is singular (except when the subject is "you" or "I"), and "don't" otherwise. But in the example above, I am having a hard time figuring out what exactly the subject is and whether it is singular.
