I have a question regarding what is the more common way (grammar structure) of saying things like "I was doing this...". Meaning that action has started in the past, was continued for some time and then finished with no definite ending stated.
I know that indicativo imperfecto past tense could be used in such case, because it is used for repeated actions in the past (was doing, used to, etc.). Let's take this as an example: I was talking = Yo hablaba (indicativo imperfecto). But I suppose you could also use continuous progressive construction in same indicativo preterito tense: Estar + past participle: Yo estaba hablado.
Which is the more commom way of saying this? How it is decided by a speaker/writer which construction to use? I suppose casual everyday speach speaking is more flexible and forgiving that writing.
My assumption is that "Yo hablaba" would have more wide meaning - not only "was speaking", but also "used to speak about something in the past", "used to speak every Sunday about something", etc. Correct?