9. Put the verbs in brackets in the past perfect. Pay attention to the action that had happened first.

Краткий ответ

1. The match had started when we arrived.
2. When we got there, we understood we had forgotten the tickets.
3. People cheered after Messi had scored a goal.
4. David was happy that Matt had helped him finish the marathon.
5. Matt knew that he had done the right thing.
6. The match was cancelled because one of the players had hurt his leg.
7. I lied that my dog had eaten my homework. Nobody believed me.
8. Tom realized his goal after he had worked hard.
9. We went cycling after we had done our homework.
10. They went out after the rain had stopped.

Как понять правило

Past Perfect образуется так: had + третья форма глагола. Он нужен, когда одно действие в прошлом закончилось раньше другого прошедшего действия.

• В предложении 2: сначала забыли билеты, потом поняли это → had forgotten, а understood — позже.
• В предложении 9: сначала сделали уроки, потом поехали кататься → had done, а went — позже.
• В предложении 1: сначала начался матч, потом мы пришли → had started, а arrived — позже.

Третья форма некоторых глаголов:
forget — forgot — forgotten, eat — ate — eaten, do — did — done, hurt — hurt — hurt.

Проверка: после had везде стоит третья форма, а второе действие остаётся в Past Simple. В живой речи после after иногда говорят и Past Simple, но в этом упражнении требуется именно Past Perfect.