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

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?