Question

преобразуйте в вопросительное и отрицательное данные предложения
Yesterday we had been playing for two hours when David arrived.
When it was 3 hours i had been wating for david for two hours

Answer 1

yesterday we hadn't been playing for two hours when david arrived
had we been playing foe two hours when david arrived yesterday?
when it was 3 houes i hadn't been waiting for david for two hours.
had i beeb waiting for david for two hours when it was 3?