3. Resumen

Importante
The Past Continuous. Affirmative
Para formar el Past Continuous, tras el sujeto, se usa el verbo TO BE en pasado (WAS/WERE) y un verbo en -ING:
Past Continuous Affirmative (PLAY) | |||||
I | was | playing | we | were | playing |
you | were | you | were | ||
he/she/it | was | they | were |

Importante
Past Continuous. Negative and Interrogative
Past Continuous Negative (PLAY) | Past Continuous Interrogative (PLAY) | |||||||||||
I | wasn't | playing | we | weren't | playing | (WH) Was | I | playing? | (WH) Were | we | playing? | |
you | weren't | you | weren't | (WH) Were | you | (WH) Were | you | |||||
he/she/it | wasn't | they | weren't | (WH) Was | he/she/it | (WH) Were | they | |||||
Ej: I wasn't sleeping (Yo no estaba durmiendo) | Ej: What were you doing? (¿Qué estabas haciendo?) |
Por último, te dejamos ejemplos de respuestas cortas:
Were you sleeping? No, I wasn't. (¿Estabas durmiendo? No.)
Were they swimming? Yes, they were. (¿Estaban nadando? Sí.)

Importante
Past Simple or Past Continuous
El Past Simple y el Past Continuous pueden usarse juntos para hacer narraciones en pasado. El Past Simple nos indica que la acción está acabada, mientras que el Past Continuous nos describe una acción que estaba desarrollándose:
I was having a shower when you phoned. (Me estaba duchando cuando llamaste)
El Past Simple es una acción que ocurre en mitad de la acción que indica el Past Continuous. No sabemos si la acción expresada por el Past Continuous finalizó o continuó.
While the teacher was speaking, the bell rang. (Mientras el profesor estaba hablando, la campana sonó)
I was watching TV when my mum appeared. (Estaba viendo la TV cuando mi madre apareció)
Usamos las conjunciones when (cuando) con el Past Simple y while (mientras) con el Past Continuous:
While I was walking, I found a coin. (Mientras estaba caminando, me encontré una moneda)
When I saw her, she was dancing. (Cuando la vi, ella estaba bailando)