1. I arrived at the hospital at 7 p.m. 2. I arrived at the hospital at around 7 p.m. 3. I arrived at the hospital around 7 p.m. --------------------------- Can we use all the expressions? Can we use 'at around' as in Sentence 3?
You could use some of the expression, but not all. In sentence 3 you should say, I arrived at the hospital about 7 p.mm and not around or between 7:15 and 7:35.
