MSN: Signs your dog has ticks or fleas: Early symptoms every pet owner should know
Signs your dog has ticks or fleas: Early symptoms every pet owner should know
One of my greatest fears as a pet owner came true the other day...my dog has fleas. My dog had been itching herself pretty constantly for the past month or so. She always has allergy flare ups this ...
As a pet owner, you need to know how comfortable your dog is. But fleas can quickly take away that comfort and make your dog itchy, frustrated, or even sick. […] ...
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.
The string I don't know that is grammatical and common and is used to express doubt. The use of subordinators if or whether after know would suggest a less firm position: he doesn't know or he's not so certain. I don't know that there are bargains yet, but there certainly are opportunities. I don't know that the President has said that he fully supports the conference of the states I don'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.