Не знаю, какое время Вы имели ввиду, но это всё написано в прошедшем времени:
Утвердительная форма:
I did morning exercises.
She slept after dinner.
We worked part-time.
Вопросительная:
Did I morning exercises?
Did she sleep after dinner?
Did we work part-time?
Отрицательная:
I didn't morning exercises.
She didn't sleep after dinner.
We didn't work part-time.