Внизу ответ
Объяснение:
My mother played the piano at 3 o'clock
My mother wasn't playing the piano at 3 o'clock
Was my mother playing the piano at 3 o'clock
Did my mother play the piano at 3 o'clock
My mother was playing the piano at 3 o′clock yesterday.
Временная форма: Past Continous
Отрицательная форма: My mother was not playing the piano at 3 o′clock yesterday.
Общий вопрос: Was my mother playing the piano at 3 o′clock yesterday?
Специальный вопрос: When was my mother was playing the piano?
