REVIEW OF PAST TENSES

Pasado Simple - (Simple Past Tense)

El Pasado Simple es un tiempo verbal que se utiliza para describir acciones que han sucedido en un tiempo anterior y que ya han finalizado, por ejemplo:

She cleaned her house. Ella limpió su casa.
I broke the window. Yo rompí la ventana.

                                                
Aquí vemos su conjugación que en el español equivale al Pretérito Indefinido. Observa que la estructura de la oración es similar a la del Presente Simple:

Tanto en la forma interrogativa como en negativa se utiliza como auxiliarDID que es la forma pasada del verbo "TO DO" y acompaña al verbo principal en su forma infinitiva. En las negaciones puede utilizarse la forma contraída de DID NOT o sea DIDN'T. En el cuadro superior se emplea el verbo To Play (Jugar) a modo de ejemplo.

Al expresar una oración en Pasado Simple se entiende que la acción no guarda relación con el presente, como vemos en los siguientes casos:

He lost the keys. Él perdió las llaves.
(Puede que en el presente las haya encontrado).

She lent me a book. Ella me prestó un libro.
(Puede que ya se lo haya devuelto).

Pasado Continuo - (Past Continuous)

El Pasado Continuo, es un tiempo verbal que describe acciones que estaban siendo realizadas en un momento del pasado al que se hace referencia y que luego continuaron, por ejemplo:

Yesterday he was studying English. Ayer él estaba estudiando inglés.
(Comenzó a estudiar antes de ese momento y continuó estudiando posteriormente)

John was playing tennis at 10 a.m. John estuvo jugando tenis a las 10 a.m.
(Comenzó a jugar tenis antes de las 10 a.m. y continuó haciendolo después)

El Pasado Continuo se construye con el verbo auxiliar "to be" en su forma pasada y el verbo principal en infinitivo con la terminación ING

Simple Past
Affirmative	I cried.
Negative	I did not cry
Interrogative	Did I cry?
Form	Regular verbs: Verb + ed | Irregular verbs: forms differ and should be learned by heart. This is a list of irregular verbs
Uses	action in the past taking place once, never or several times actions taking place one after another

Past Progressive
Affirmative	He was driving.
Negative	He was not driving.
Interrogative	Was he driving?
Form	to be (in the simple past) + verb + ing
Uses	action going on at a certain time in the past actions taking place at the same time action in the past that is interrupted by another action

Past Perfect Progressive
Affirmative	He had been waiting.
Negative	He had not been waiting.
Interrogative	Had he been waiting?
Form	had + been + verb + ing
Uses	action taking place before a certain time in the past sometimes interchangeable with past perfect simple putting emphasis on the duration or course of an action

Exercises

Choose the correct verbs so that each tense appears once.
Simple past, past progressive, past perfect simple, past perfect progressive

1.     We  went were going had gone had been going  to the cinema last week.

2.     A bird pooed on the window that I   cleaned was cleaning had cleaned had been cleaning  only a minute before.

3.     Yesterday at nine he  sat was sitting had sat had been sitting  in front of his computer.

4.     When their mum got home, the boys  watched were watching had watched had been watching  TV for two hours.