AFIRMATIVA:
Sujeto + was / were + forma ing del verbo principal
He was walking
We were walking
NEGATIVA:
Sujeto + was / were + not + forma ing del verbo principal
She was not walking
They were not walking
INTERROGATIVA:
Was / Were + sujeto + forma ing del verbo principal
Was I walking?
Were you walking?
El Past Continuous (pasado continuo) se emplea para describir una acción que estaba ocurriendo en un momento concreto del pasado. La acción comenzó antes de dicho momento y continuó después.
I was studying at 10 o'clock yesterday
También se emplea para acciones largas, resaltando que duraron mucho tiempo.
I was studying all day yesterday
He was talking on the phone for a long time
En este caso suele ir acompañado de expresiones temporales como all day, all night, the whole day, for a long time, during, etc.
Otro uso del pasado continuo es para acciones prolongadas que ocurrieron en el pasado al mismo tiempo.
While you were reading the paper, I was doing my homework
Con este uso va acompañado de las expresiones while, as o and.
La más larga de dos acciones, que fue interrumpida por una más breve que va en pasado simple.
I was singing a song when it began to rain
He was writing to me when he received my e-mail
gracias me sirvio de mucho de tu explicacion
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