What is the correct usage of phrase you don't know what you don't know? 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. I saw this sentence in the book 1q84:
In (2), however, the object of. It's not just you that don't know. I already know how to turn on the television.
I know (about) this difficulty/problem. Please let me know as soon as you figure it out. Recently one of my friends told me that there is distinct difference between 'know of something' and 'know about something' expressions. You would use the present perfect to express something that happened previously, without specifying the time.
Can it be used in formal conversation/writing? Alright, well, for example, like on saturdays, y’know, what i liked to do. 'know of' is used when you have personal. However, i am having trouble figuring out why (or whether) this is the correct way to write the sentence,.
Also explain the difference between the two, thanks. I know how to drive a car.