In this lesson we are only dealing with the conjugation of the tense, therefore there is no emphasis on how/when we use it. We want the students to focus on the form only. But we do have a different lesson explaining when to use it, and we compare it with the other "was doing" which is El imperfecto progresivo, "estaba haciendo".
As previously mentioned to Papi in a previous question, the preterite tense (progressive or non-progressive) doesn't always come with a time phrase. Sometimes that time phrase is known as it was mentioned before in the conversation, or simply, you don't add a time phrase. When using a preterite tense, the speaker is seeing that action in the past as a "completed action". If you have a look at these two lessons, everything will be clearer:
1. Lesson on difference between El Indefinido progresivo and El Imperfecto progresivo
2. Lesson on difference between El Indefinido and El Imperfecto (general use, with no time frames)
I hope you see it with more clarity after seen these two lessons.
Sign in to submit your answer
Don't have an account yet? Join today
Test your Spanish to the CEFR standard