When - While

Example: 

1.- We were watching TV when Claudia called.

(Nosotros estábamos viendo televisión cuando Claudia llamó).

2.- I was speaking when she sat. (Yo estaba hablando cuando ella se sentó)

The past progressive is a past tense whichis used to talk about the development of an action that took place in a certain.

Usos del Pasado Progresivo

USAGE:

Speaking about something we-were doing in past.

Verb Tense:

Past simple (Verb To Be)

Verb Classification:

In GERUND

Example:

* He wasn´t reading books. ( Negative )

* Was he reading books?. ( Interrogative)

* He was reading books. ( Afirmative )

If reading a sentence notice that the verb is conjugated in the past tenseprogressive (or continuous), know that in English this time is used to describe actions or situations that were happening at some point in the past.Generally, the past progressive is used with the simple past in a sentence

The present progressive is formed with the past of the verb "to be" (was / were) plus another verb in the infinitive to which is added the ending "-ing".

 

Be + V-ing.

Example:

1.	Jerry was always making mistakes when he was working here.  (Jerry siempre estaba cometiendo errores cuando estaba trabajando aquí.)

2.John was talking to his girlfriend on the phone when I came in and was still talking to her when I went out an hour later.   

(John estaba hablando con su polola por teléfono cuando llegé y seguía hablando con ella cuando me fui una hora después.

Pasado Progresivo

Definicion:

Is a past tense, which is used to talk about the development of an action that took place in a certain time, do not know or whose order is immaterial, as well as to express that an action took place when another interrupted and finally refer toactions occurring simultaneously.      

                                       

Verbo Auxiliar

Were/ Was (1st and 3rd Persons)

Estructura de las oraciones:

Oraciones Afirmativas

Pronombre /Sujeto + was/were + Verbo – ing + Complemento + Time expression

Oraciones Negativas

Pronombre / sujeto + wasn´t/weren´t + Verbo-ing + Complemento + Time Expression

Oraciones Interrogativas

Was/Were + Subject + verbo-ing + Complemento + Time expression + ?

Reglas de verbos en Gerundio

Terminación del verbo	Particle aggregate	Terminación del verbo	Partícula agregada
-e	Se quita –e + “ing”.	Vowel + “l”	Double “l” + “ing”
Vowel-consonant (one syllable)	Double  consonant +   “ing”	-ie	Change –ie for –y  + “ing”
Vowel+ consonant(2 or more syllables)		Double de consonant + “ing”