Вопрос и отрицание в прошедшем продолженном времени, с данным предложением: Robert (2.45/to speak) on the phone. Пример прикреплен. Сама не могу. Спасибо.

Robert was speaking on the phone at 2.45 ( quarter to three)

Robert was not speaking on the phone at 2.45 ( quarter to three)

Was Robert speaking on the phone at 2.45? ( quarter to three)