сов.
( в течение какого-то времени; о живом существе ) swim* be swimming; ( о судне ) sail, be sailing
он проплавал целый час — he has been swimming for a whole hour, he spent an hour swimming
корабль проплавал два дня — ship sailed for two days, the ship was sailing for two days
проплавать всю жизнь матросом — be a sailor all one's life