O “Past Continuous” é formado com o verbo to be no passado (como auxiliar) mais o verbo principal com “ING”.

O “Past Continuous” é usado para indicar uma ação progressiva no passado ou um período de tempo, num momento definido ou não.

Exemplo:
The scientist was developing a new project from 8:00 to 10:00 o’clock.
The soldiers were resting from one pm. to two pm.
Usado para indicar simultaneidade no passado (Simple Past + Past Continuous ou Past Continuous + Past Continuous). Nesse caso, a ligação é feita, principalmente, pelos advérbios WHEN, WHILE, AS SOON AS, TILL, UNTIL, BEFORE, AFTER, AS LONG AS, WHENEVER e BY THE TIME.

Exemplo:
Gabriel was studying Math when I arrived.
My wife was talking on the phone while I was having lunch.
Usado com advérbios de frequência para comunicar que uma ação ou evento ocorria habitualmente ou com regularidade no passado.
Exemplo:
Marlon was always playing his guitar when he was a teenager.
They were frequently visiting their grandmother when they were in Petrópolis.
Conjugação do “Past Continuous”
