Поставьте в пропуски глаголы в соответствующей форме (past progressive) 1. when i phoned my friends, they(play) monopoly. 2. yesterday at six i (prepare) dinner. 3. the kids (play) in the garden when it suddenly began to rain. 4. i (practise) the giutar when he came home. 5. we (not/cycle) all day. 6. while aron (work) in his room, his friends (swim) in the pool. 7. i tried to tell them the truth but they (listen,not). 8. what (you/do) yesterday? 9. most of the time we (sit) in the park.

Вот правильные формы глаголов в прошедшем длительном времени (Past Progressive / Past Continuous). Для образования этого времени используется вспомогательный глагол was (для I, he, she, it) или were (для you, we, they) и основной глагол с окончанием -ing.

1. When I phoned my friends, they were playing monopoly.
2. Yesterday at six I was preparing dinner.
3. The kids were playing in the garden when it suddenly began to rain.
4. I was practising the guitar when he came home.
5. We were not cycling (или weren't cycling) all day.
6. While Aron was working in his room, his friends were swimming in the pool.
7. I tried to tell them the truth but they were not listening (или weren't listening).
8. What were you doing yesterday?
9. Most of the time we were sitting in the park.

Краткая справка по правилам написания:

• prepare $$ preparing: если глагол заканчивается на немую -e, она опускается.
• swim $$ swimming и sit $$ sitting: если глагол короткий и заканчивается на «согласная-гласная-согласная», последняя буква удваивается.

Я могу составить для вас проверочный тест на закрепление разницы между Past Simple и Past Progressive, если это необходимо.