PAST PROGRESSIVE.1. My father was watching an interesting programme on TV, while I was reading for the examination.2. We were playing the chess when the telephone rang.3. My parents were having an unpleasant conversation when I came into their room.4. Yesterday I was trying to beat the computer at chess all evening.5. In the zoo the lions were being fed from 8.00 till 8.30 in the morning.6. While we were having a swim in the lake, Mary was preparing a pleasant surprise for us.7. When we were playing football, I suddenly broke my leg.8. My mother was sewing a dress when our plumber knocked at the door.9. When we were hopelessly losing the match, she gave me a smile.10. I was writing a newspaper article while my wife was having a rest in the garden.PAST SIMPLE.1. We graduated from the Institute in 1987.2. My friend went to England to work for a probationary period three months ago.3. I was on holiday in Bulgaria two weeks ago.4. A friend of mine wrote a new operating system two months ago.5. I was fond of swimming two years ago.6. Tom forgot to remind me of the forthcoming lecture at Moscow State University yesterday.7. I ate an apple, drank a glass of lemonade and went to school.8. I wrote three novels last year.9. I saw a lion in the zoo yesterday.10. She was my bride in 1999.The Past Indefinite обозначает действия, имевшие место в прошлом и время совершения которых истекло: last year - в прошлом году, five days ago - пять дней тому назад, yesterday - вчера, in 1945 - в 1945 году и т.д. Прошедшее неопределённое время широко используется в повествовании для описания последовательных событий прошлого. Основным назначением Past Progressive является обозначение действий, протекавших в точно указанное время в прошлом.Дополнительными характеристиками таких действий являются их незаконченность, динамичность и наглядность. Момент, в который протекает интересующее нас действие, часто бывает обозначен другим коротким действием в the Past Simple.