Past continuous три формы

Утвердительные предложения:

I was playingWe were playing You were playingYou were playing He / she / it was playingThey were playing

Вопросительные предложения:

Was I playing? Were we playing? Were you playing? Were you playing? Was he / she / it playing? Were they playing?

Отрицательные предложения:

I was not playingWe were not playing You were not playingYou were not playing He / she / it was not playing They were not playing

He was reading a book.

He was not reading a book.

Was he reading a book?