Время Past Continuous образуется was/were + глагол с окончанием -ing
WAS ставим с I, he, she, it
Were - с we, you и they
Используем это время, когда действие происходило (продолжалось) в определенный момент (или период) в прошлом. Например, I was playing computer games at 5 o'clock yesterday. или We were playing computer games since 5 till 6 o'clock yesterday.
Либо когда одно действие прервало другое - I was playing computer games when my mother came home.
Вопрос:Was she playing computer games at 3 o'clock yesterday? - was или were ставим на первое место.
Отрицательное предложение: She wasn't playing computer games at 3 o'clock yesterday. They were not playing computer games at 3 o'clock yesterday.