Do you want to gift a ring to a loved one or your girlfriend, but you don’t know their size? Knowing the ring size is essential information for you to be able to place an order. Gifting a ring doesn’t ...
Examples: I know (about) this difficulty/problem. I know (about) Engineering. In the first sentence, it seems to me that "to know" expresses that the speaker experienced the problem/difficulty before while "to know about" only expresses that the speaker has heard or read about it.
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 to question, and you are answering that challenge). Let's say "out of the blue" you wanted to state that "you know that" -- and you wanted an emphatic version.
I saw this sentence in the book 1Q84: It's not just you that don't know. However, I am having trouble figuring out why (or whether) this is the correct way to write the sentence, as opposed to: ...
Android Authority: Samsung Galaxy Ring is here: Price, size, release date, and everything else!
Samsung Galaxy Ring is here: Price, size, release date, and everything else!
Cosmopolitan: How to measure your ring size at home: An expert guide
Hollywood Life: Gifting A Ring — How To Get The Right Ring Size Without Blowing the Surprise
Gifting A Ring — How To Get The Right Ring Size Without Blowing the Surprise