used in negative statement to describe a situation that has existed up to this point or up to the present time; "So far he hasn't called"; "the sun isn't up yet"
used in negative statement to describe a situation that has existed up to this point or up to the present time; "So far he hasn''t called"; "the sun isn''t up yet"
used in negative statement to describe a situation that has existed up to this point or up to the present time
