Find mistakes and correct them. 1) I had written my test at 2 o'clock. 2) When our parents had returned home, the film had already finished. 3) Sue gave me the report which she typed in the morning. 4) By the end of last week all the students passed their exams. 5) Why not Sam had called me back by 8 o'clock yesterday? 6) Greg had chosen the present and asked the shop assistant to pack it. 7) How many articles did Betty typed by the end of last month? 8) Amanda cooked supper before her husband returned home. 9) By what time had the passengers leave the plane? 10) Where had you gone after the lessons had finished?

1. I had written my test at 2 o'clock.
   Ошибка: Past Perfect здесь не нужен, потому что указано точное время в прошлом — at 2 o’clock. Нужно Past Simple.
   Correct: I wrote my test at 2 o'clock.
   Перевод: Я писал / написал контрольную в 2 часа.

2. When our parents had returned home, the film had already finished.
   Ошибка: после when действие “parents returned home” произошло позже, чем “film had finished”, поэтому первое действие обычно ставится в Past Simple, а более раннее — в Past Perfect.
   Correct: When our parents returned home, the film had already finished.
   Перевод: Когда наши родители вернулись домой, фильм уже закончился.

3. Sue gave me the report which she typed in the morning.
   Ошибка: если нужно показать, что она напечатала отчёт раньше, чем дала его мне, лучше использовать Past Perfect.
   Correct: Sue gave me the report which she had typed in the morning.
   Перевод: Сью дала мне отчёт, который она напечатала утром.

4. By the end of last week all the students passed their exams.
   Ошибка: выражение by the end of last week показывает, что действие завершилось к определённому моменту в прошлом, поэтому нужен Past Perfect.
   Correct: By the end of last week all the students had passed their exams.
   Перевод: К концу прошлой недели все студенты сдали экзамены.

5. Why not Sam had called me back by 8 o'clock yesterday?
   Ошибка: неправильный порядок слов в вопросе. В Past Perfect вопрос строится так: Why had + subject + not + V3...?
   Correct: Why had Sam not called me back by 8 o'clock yesterday?
   Также можно: Why hadn’t Sam called me back by 8 o'clock yesterday?
   Перевод: Почему Сэм не перезвонил мне к 8 часам вчера?

6. Greg had chosen the present and asked the shop assistant to pack it.
   Ошибка: если это последовательность действий в прошлом, нужен Past Simple в обоих случаях. Past Perfect не нужен, если нет другого более позднего действия, относительно которого “chosen” произошло раньше.
   Correct: Greg chose the present and asked the shop assistant to pack it.
   Перевод: Грег выбрал подарок и попросил продавца упаковать его.

7. How many articles did Betty typed by the end of last month?
   Ошибка: после did используется первая форма глагола, но здесь выражение by the end of last month требует Past Perfect. Поэтому нужно had Betty typed.
   Correct: How many articles had Betty typed by the end of last month?
   Перевод: Сколько статей Бетти напечатала к концу прошлого месяца?

8. Amanda cooked supper before her husband returned home.
   Грамматически предложение возможно, но если нужно подчеркнуть, что ужин был приготовлен до возвращения мужа, лучше использовать Past Perfect.
   Correct: Amanda had cooked supper before her husband returned home.
   Перевод: Аманда приготовила ужин до того, как её муж вернулся домой.

9. By what time had the passengers leave the plane?
   Ошибка: в Past Perfect после had нужен глагол в третьей форме: left, а не leave.
   Correct: By what time had the passengers left the plane?
   Перевод: К какому времени пассажиры покинули самолёт?

10. Where had you gone after the lessons had finished?
    Ошибка: после after более раннее действие уже выражено Past Perfect — had finished, а следующее действие обычно ставится в Past Simple.
    Correct: Where did you go after the lessons had finished?
    Можно также проще: Where did you go after the lessons finished?
    Перевод: Куда ты пошёл после того, как уроки закончились?

Итоговый исправленный вариант:

1. I wrote my test at 2 o'clock.

2. When our parents returned home, the film had already finished.

3. Sue gave me the report which she had typed in the morning.

4. By the end of last week all the students had passed their exams.

5. Why hadn’t Sam called me back by 8 o'clock yesterday?

6. Greg chose the present and asked the shop assistant to pack it.

7. How many articles had Betty typed by the end of last month?

8. Amanda had cooked supper before her husband returned home.

9. By what time had the passengers left the plane?

10. Where did you go after the lessons had finished?