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. Alright, well, for example, like on saturdays, y’know, what i liked to do.
Please let me know as soon as you figure it out. I already know how to turn on the television. 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. Recently one of my friends told me that there is distinct difference between 'know of something' and 'know about something' expressions. Can it be used in formal conversation/writing? What is the correct usage of phrase you don't know what you don't know?
In (2), however, the object of. In the first sentence, it seems to me that to know expresses that the speaker experienced the problem/difficulty. Why would you have a problem with this? It's not just you that don't know.
I know (about) this difficulty/problem. I know how to drive a car.