1. By eight o'clock yesterday I __________ (to do) my homework and at eight I __________ (to play) the piano. 2. My head hurt because I __________ (listen) to music for three hours. 3. My sister __________ (do) the laundry since early morning. 4. By nine o'clock yesterday grandmother __________ (to wash) the dishes and at nine she __________ (to watch) TV. 5. When I __________ (to meet) Tom, he __________ (to eat) an ice cream which he __________ (to buy) at the corner of the street. 6. Brown understood the problems of his agency because he __________ (work) for it since 2005. 7. The boy __________ (to want) to act the main part in the play because he (to organize) the theatre 8. Lanny __________ (not to know) who (to attack) him in the darkness.

Ответ

1. By eight o'clock yesterday I had done (Past Perfect) my homework and at eight I had been playing (Past Perfect Continuous) the piano.
2. My head hurt because I had been listening (Past Perfect Continuous) to music for three hours.
3. My sister has been doing (Present Perfect Continuous) the laundry since early morning.
4. By nine o'clock yesterday grandmother had washed (Past Perfect) the dishes and at nine she was watching (Past Continuous) TV.
5. When I met (Past Simple) Tom, he was eating (Past Continuous) an ice cream which he had bought (Past Perfect) at the corner of the street.
6. Brown understood the problems of his agency because he had been working (Past Perfect Continuous) for it since 2005.
7. The boy wanted (Past Simple) to act the main part in the play because he had organized (Past Perfect) the theatre.
8. Lanny didn't know (Past Simple) who had attacked (Past Perfect) him in the darkness.

В заданиях использованы Past Perfect для действия, завершенного до определенного момента в прошлом, и Past Perfect Continuous для действия, длившегося до определенного момента в прошлом.

Редфлаг: Past Perfect помогает установить последовательность событий в прошлом, особенно когда нужно показать, что одно действие завершилось раньше другого.