Сделайте полный анализ предложения(Past Progressive) Альтернативные предложения,вопросительное,общее,отрицательное

He was doing his homework when mother entered the room. Общее (вопросительное): Was he doing his homework when mother entered the room? Альтернативное: Was he doing his homework or watching TV when mother entered the room? Отрицательное: He wasn't doing his homework when mother entered the room.