Что такое настоящее совершенное время? кратко и своими словами

Ну то есть это действие было совершено в прошлом,но связано с настоящим.или,например,оно совершалось в прошлом и закончилось в настоящем. например: я уже помыла посуду. я начала  мыть  посуду   и закончила её мыть сейчас.то есть действие завершилось к настоящему моменту,но начиналось в прошлом.вот

Время произошло ,но мы не знаем когда оно пооизошло

Lots of people in the world are fond of sports and games. some like keeping fit and healthy, some like doing sport to become more organized and disciplined, and some like sport because it’s a competitive activity. russian people are no exception. they also like different types of sport both doing them and watching. moreover, sport has always been very popular in our country and there are hundreds of olympic champions who come from russia. among them, alina kabaeva, evgeni plushenko, yevgeny kafelnikov, ilia kulik, elena berezhnaya and many others. nearly every russian city has a number of stadiums, swimming-pools, tennis courts, skiing slopes, ice rinks, and many other sports facilities. traditionally all sports in the country are divided into professional and amateur. professional sportsmen take part in different important competitions and championships. lots of world records in sports have been set by russian sportsmen, especially by weightlifters, swimmers, gymnasts, figure skaters, tennis players, runners, jumpers and other professionals in their field. apart from that, russian sportsmen have won lots of gold, silver and bronze medals for their country in the olympic games. thanks to the growing popularity of sport, there appear more and more fitness centers, where not only professional sportsmen but also the amateurs can do yoga, aerobics and bodybuilding exercises. it’s useful fro every person, as it helps to keep fit and in good shape. other amateurs prefer simply to ride a bicycle or roller-skate in the nearest parks. more expensive and risky activities, which are available for amateurs in russia, include scuba-diving, horse-riding, car-racing, skiing and some other sports как то так

Плавучие острова племени урос в озере титикака полностью состоят из тростника. этот искусственный архипелаг был создан несколько тысяч лет назад уросами, бежавшими от наступающего племени инков, чтобы сохранить свою самобытность. поверхность островов представляет собой связки тростника в 1,5-2 метра, поэтому она вовсе не твердая, как это кажется издалека, и прогибается под весом человека. тростник здесь служит не только "землей", но и материалом для создания лодок, сувениров, предметов хозяйственного обихода, его даже употребляют в пищу. основным промыслом жителей плавучих островов является рыбная ловля и охота, а с недавних пор еще и туризм. молодые уросы используют остров в качестве дополнительного заработка, представляя туристам необычные экскурсии в уникальный быт древнего народа перу. the floating islands of the uros tribe in lake titicaca consist entirely of reeds. this artificial archipelago was created several thousand years ago by the monstrosities that fled from the advancing tribe of the incas to preserve their identity. the surface of the islands is a reed bunch of 1.5-2 meters, so it is not at all solid, as it seems from a distance, and bends under the weight of a person. reed here serves not only as a "land", but also as a material for the creation of boats, souvenirs, objects of economic use, it is even used for food. the main fishery for residents of floating islands is fishing and hunting, and more recently also tourism. young lessons use the island as additional earnings, presenting tourists with unusual excursions to the unique life of the ancient people of peru.