Теория:
Study some information about negative sentences in Past Perfect.
Для образования Past Perfect необходимо использовать вспомогательный глагол had и основной глагол в третьей форме (если это неправильный глагол), либо глагол с окончанием -ed (если глагол правильный).
Для построения отрицательного предложения нужно использовать следующий порядок слов:
subject \(+\) had \(+\) not \(+\) V\(3\)/Ved \(+\) other parts of the sentence.
-ed или в третьей форме остаётся без изменений.
Examples:
Mary had not (hadn't) cooked breakfast by \(7\) am yesterday.

Рис. \(1\). Breakfast
Jack had not (hadn't) gone to bed before his parents came home.
I | had not (hadn't) studied |
you | had not (hadn't) studied |
he, she, it | had not (hadn't) studied |
we | had not (hadn't) studied |
You | had not (hadn't) studied |
They | had not (hadn't) studied |
Источники:
Рис. 1. Breakfast, 2016, https://pixabay.com/images/id-2291908/ Pixabay License CC0 Free for commercial use No attribution required