XIII. Put the verbs in brackets into Past Simple or Past Continuous. 1. They (prepare) for the party, when their parents ... (come). 2. Jake and Sam ... (clean) out the pond, while Liz ... (collect) rubbish.

Перевод задания: Поставьте глаголы в Past Simple или Past Continuous.

1. They were preparing for the party when their parents came. (Они готовились к вечеринке, когда пришли родители.) Длительное действие — Past Continuous, прервавшее его событие — Past Simple.
2. Jake and Sam were cleaning out the pond, while Liz was collecting rubbish. (Джейк и Сэм чистили пруд, а Лиз собирала мусор.) Два одновременных процесса выражаются Past Continuous.