1. The Past Continuous is used to express continuous actions occurring in the past.
Past Continuous geçmişte zamanın belirli bir anında devam etmekte olan eylemleri ve olayları ifade etmek için kullanılır.
I was watching TV at home last night.
They were playing football yesterday afternoon.
2. The Past Continuous tense is frequently used to refer to an ongoing action which was taking place when something else occurred in the past.
Geçmişte devam etmekte olan bir olay esnasında başka bir eylem gerçekleşirse ve bu olaylar "when" ile kurulmuşsa simple past ve past continuous tense birlikte ifade edilir.
My father was watching TV when I arrived at home.
He was reading book while she was washing the dishes.