I see ‘round’ and ‘around’ are uses in the book. Most ones can be placed by the other ones, I think. Can you teach me what the difference between them?
Around is an adverb or preposition that can sometimes be replaced by round used as an adverb or preposition.
He walked around/round the block.
But round can also be an adjective or verb, and cannot be replaced with 'around' when used in those functions.
He rounded the bend. (round as verb)
The plate was round. (round as adjective)
When "around" is used to mean "in the area of" it is less likely to be replaced by "round", although it still can be:
I often saw him around the neighborhood.
When "around is used to mean "approximately" the use of "round" is also less likely:
I think he weighs around 200 pounds.
It should take me around 3 days to finish
In this usage "about" can be used in place of "around".