Question

Как образуется вопросительная и отрицательная
формы в Past Perfect?

Answer 1

He had translated the text by the evening.
He hadn't translated the text...
Had he translated the text ...?
What had he translated by the evening?

Answer 2

had+3 форма глагола
Had I played?

had+not+3 форма глагола
I had not played