Ответ:

Перевод задания: Напишите глагол operate в Past Perfect Simple.

I had operated (я работал(а)); You had operated (ты работал(а)); He had operated (он работал); She had operated (она работала); It had operated (оно работало); We had operated (мы работали); You had operated (вы работали); They had operated (они работали).

Past Perfect образуется одинаково для всех лиц: had + третья форма глагола. У правильного глагола operate форма причастия — operated.