Recently one of my friends told me that there is distinct difference between 'know of something' and 'know about something' expressions. 'know of' is used when you have personal experience with wha...
Why do you think that He doesn't know him from his schooldays means that he does know him? It would only have that sense if you added something like In fact, he first met him at university.
Lansing State Journal: An Asian earthworm may be ruining your yard, garden. What to know about jumping worms
An Asian earthworm may be ruining your yard, garden. What to know about jumping worms
According to the Colorado Department of Agriculture, Asian jumping worms are red-to-brown colored and can grow up to 6 inches in length. They’re also known as ...
Knoxville News Sentinel: Does Tennessee have hammerhead worms? Yes, and here's what to do
Worms are a bit creepy for many people and even more so when we learn a species is invasive and harmful in the garden. The damage the bad-guy worms cause is why it's a good idea to get to know worm ...
We all know the early bird gets the worm, but how does he find it? That American Robin in your neighborhood park—how did it dig up the juicy nightcrawler dangling from its bill? After all, worms live ...
"Know about" vs. "know of" - English Language & Usage Stack Exchange
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.