Давайте перейдем к решению ваших упражнений. Я раскрою скобки, употребляя глаголы в Past Simple и Past Perfect, и объясню, как используется каждый из этих времён.
Упражнение 1
By two o’clock the teacher had examined all the students.
- had examined — Past Perfect, так как действие завершилось к двум часам.
On my way to school I remembered that I had left my report at home.
- remembered — Past Simple, действие произошло в прошлом; had left — Past Perfect, так как оставление отчета произошло раньше, чем я вспомнил об этом.
All my friends were glad to hear that I had passed all the exams successfully.
- were — Past Simple; had passed — Past Perfect, так как действия завершились до момента, когда друзья об этом узнали.
The poor boy opened his eyes, looked around, and tried to remember what had happened to him.
- opened, looked, tried — Past Simple; had happened — Past Perfect, так как это произошло до того, как он попытался вспомнить.
All the passengers saw at once that the old man had traveled a lot in his life.
- saw — Past Simple; had traveled — Past Perfect, так как это действие завершилось до момента, когда пассажиры это осознали.
By the time we came to see him, he had left home.
- came — Past Simple; had left — Past Perfect, так как его уход произошёл раньше нашего прихода.
During the holidays my friend visited the village where he had lived in his childhood.
- visited — Past Simple; had lived — Past Perfect, так как он жил там до посещения.
When they entered the hall, the performance had already begun.
- entered — Past Simple; had begun — Past Perfect, так как начало представления произошло до их входа.
When I came home, my mother had gone to the shops.
- came — Past Simple; had gone — Past Perfect, так как мама ушла раньше, чем я пришёл.
He had studied French before he entered the university.
- had studied — Past Perfect, так как изучение произошло раньше поступления в университет; entered — Past Simple.
Упражнение 2
I thought he had already gone home.
- thought — Past Simple; had gone — Past Perfect, так как его уход произошёл до того, как я это подумал.
I did not see him after we met at the concert.
- did not see и met — обе формы Past Simple.
He had left the house before I had time to ask him anything.
- had left — Past Perfect; had — Past Simple, так как его уход завершился до момента, когда у меня было время.
After he spent some days in Paris, he felt lonely and wanted to return home.
- spent, felt, wanted — все в Past Simple.
He spoke a language we had never heard before.
- spoke — Past Simple; had heard — Past Perfect, так как незнакомый язык был до того, как мы его услышали.
When the rain stopped, I looked out of the window.
- stopped и looked — обе формы Past Simple.
The telegram came some minutes after he had left.
- came — Past Simple; had left — Past Perfect.
She thought that Tom and Lanny had quarreled.
- thought — Past Simple; had quarreled — Past Perfect.
The girl was glad that she had found a seat near the window.
- was — Past Simple; had found — Past Perfect.
He remembered that he had not called her up in the morning.
- remembered — Past Simple; had not called — Past Perfect.
By the time the train reached the city, he had made friends with many passengers.
- reached — Past Simple; had made — Past Perfect.
When my uncle left, he hurried to the station to book a ticket.
- left и hurried — обе формы Past Simple.
Упражнение 3
By eight o’clock yesterday I had finished my work and at eight I played the piano.
- had finished — Past Perfect; played — Past Simple.
By six o’clock father had come home and at six he had dinner.
- had come — Past Perfect; had — Past Simple.
By nine o’clock yesterday grandmother had washed the dishes and at nine she watched TV.
- had washed — Past Perfect; watched — Past Simple.
When I met Tom, he was eating an ice-cream which he had bought at the corner of the street.
- met — Past Simple; was eating — Past Continuous; had bought — Past Perfect.
When father came home, we were cooking the mushrooms which we had gathered in the wood.
- came — Past Simple; were cooking — Past Continuous; had gathered — Past Perfect.
When I saw Ann, she was looking at the flowers which she had picked in the field.
- saw — Past Simple; was looking — Past Continuous; had picked — Past Perfect.
When I came home yesterday, I saw that my little brother had broken my pen and was playing with its pieces.
- came — Past Simple; saw — Past Simple; had broken — Past Perfect; was playing — Past Continuous.
When I opened the door of the classroom, I saw that the teacher already had come and a student was writing a test.
- opened — Past Simple; saw — Past Simple; had come — Past Perfect; was writing — Past Continuous.
When I came home, my sister was reading a book which she had brought from the library.
- came — Past Simple; was reading — Past Continuous; had brought — Past Perfect.
When mother came home, the children were eating the soup which she had cooked in the morning.
- came — Past Simple; were eating — Past Continuous; had cooked — Past Perfect.
When I rang up Mike, he still was learning the poem which he had begun learning at school.
- rang — Past Simple; was learning — Past Continuous; had begun — Past Perfect.
When I looked out of the window, the children were playing with a ball which Pete had brought from home.
- looked — Past Simple; were playing — Past Continuous; had brought — Past Perfect.
Вот так мы решили все упражнения. Если у вас есть вопросы или нужно что-то уточнить, дайте знать!