Present Perfect Tense - действие, совершившееся в связано с настоящим, есть результат. Образуется:To have Present Simple + V-3форма I have written Не has written We have written They have written I have not written She has not written We have not written They have not written Have I written? Yes, I have No, I haven't Has he written? Yes, he has No, he hasn't Have you written? Yes, you have No, you haven't Надо запомнить типичные для Present Perfect обстоятельства времени: already, (not) yet, just, ever, never, since. Сравните: I have bought a book today (this week, this month) не истекший отрезок времени - Present Perfect I bought a book yesterday (last week, last month) истекший отрезок времени - Past Simple Важные примеры: I have never been to France. Have you ever been to London? I haven't seen you for ages. I haven't met him for a long time. I haven't been to Moscow since last year.
Uranus is the seventh planet from the sun. Scientists attribute it to the planets - giants, because it is a third of the diameter and weight - the fourth. It is very far away from our planet, and probably not soon go there even misdirected satellite.The distance from Earth to Uranus is 18 times greater than the distance from the Sun to Earth - about 2,721,400,000. Km. Temperature is the lowest on the planet - up to -224 degrees below zero. It was discovered in 1781 by English astronomer William Herschel, and is named after the Greek god of the sky Uranus, the father of Cronus.
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