Теория:
Study some information about negative sentences in Past Continuous.
Для образования Past Continuous необходимо использовать вспомогательный глагол to be (варианты was, were) и основной глагол, к которому мы добавляем окончание -ing.
Для построения отрицательного предложения нужно использовать следующий порядок слов:
subject \(+\) to be (was/were) \(+\) not \(+\) Ving \(+\) other parts of the sentence.
Was используем для первого и третьего лица единственного числа (I, he, she, it).
Were — в остальных случаях.
Частицу 'not' ставим сразу после вспомогательного глагола, смысловой глагол с окончанием -ing остаётся без изменений.
I | was not (wasn't) studying |
you | were not (weren't) studying |
he, she, it | was not (wasn't) studying |
we | were not (weren't) studying |
You | were not (weren't) studying |
They | were not (weren't) studying |
Examples:
Jim was not reading this book the whole evening.

We were not studying English at \(5\) o'clock yesterday.
Источники:
https://www.businessinsider.com.au/best-financial-books-for-your-people-2014-5