4. Choose the correct variant: 1. By the time Tom arrived at the station, the train has already been leaving / had already left. 2. How long had you been trying / had you tried to call Tom before he finally answered the phone? The children played/ were playing / had played with their toys when their mum came back 5. What happened was happening/had happened last Monday? home. 4. Alan had a headache because he had played /had been playing / played computer games all afteroon. 6. The birds sang / were singing /sing noisily around when we met in the park. 7. At last he got the opportunity he had been waiting/waited /is waiting for so long. The room looked beautiful, as she had changed /changed / was changing the furniture and the tinto theastense

Конечно! Давайте разберем каждый вопрос, чтобы выбрать правильный вариант и объяснить, почему он подходит.

1. By the time Tom arrived at the station, the train has already been leaving / had already left.

   • Правильный вариант: had already left.
   • Объяснение: Здесь требуется паст прост (Past Perfect), чтобы показать, что действие (поезд ушел) произошло до момента (прибытия Тома).

2. How long had you been trying / had you tried to call Tom before he finally answered the phone?

   • Правильный вариант: had you been trying.
   • Объяснение: Past Perfect Continuous ("had been trying") подчеркивает длительность действия, которое происходило до другого момента в прошлом (ответа Тома).

3. The children played / were playing / had played with their toys when their mum came back.

   • Правильный вариант: were playing.
   • Объяснение: Прошедшее продолженное время (Past Continuous) используется здесь, потому что действие (игра детей) происходило в момент, когда второе действие (возвращение мамы) произошло.

4. What happened was happening/had happened last Monday?

   • Правильный вариант: happened.
   • Объяснение: В данном случае подразумевается вопрос о событии, которое произошло (Past Simple).

5. Alan had a headache because he had played / had been playing / played computer games all afternoon.

   • Правильный вариант: had been playing.
   • Объяснение: Past Perfect Continuous здесь указывает на действие, которое происходило до другого момента в прошлом и объясняет причину головной боли.

6. The birds sang / were singing / sing noisily around when we met in the park.

   • Правильный вариант: were singing.
   • Объяснение: Прошедшее продолженное время передает атмосферу события (пение птиц) в момент встречи.

7. At last he got the opportunity he had been waiting / waited / is waiting for so long.

   • Правильный вариант: had been waiting.
   • Объяснение: Past Perfect Continuous подчеркивает, что он долго ждал эту возможность до момента, когда она появилась.

8. The room looked beautiful, as she had changed / changed / was changing the furniture.

   • Правильный вариант: had changed.
   • Объяснение: Использование Past Perfect указывает на то, что действие (изменение мебели) прошло до того, как мы увидели комнату.

Если у вас есть еще вопросы по грамматике или другим темам, не стесняйтесь спрашивать!