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. 'know of' is used when you have personal. Please let me know as soon as you figure it out.
Why would you have a problem with this? I know (about) this difficulty/problem. However, i am having trouble figuring out why (or whether) this is the correct way to write the sentence,.
It's not just you that don't know. In (2), however, the object of. Can it be used in formal conversation/writing? Recently one of my friends told me that there is distinct difference between 'know of something' and 'know about something' expressions.
I saw this sentence in the book 1q84: For me, know implies knowledge of details or individual pieces, while am aware of implies a knowledge only of a whole. Also explain the difference between the two, thanks. Alright, well, for example, like on saturdays, y’know, what i liked to do.
In the first sentence, it seems to me that to know expresses that the speaker experienced the problem/difficulty.