The past continuous tense is used to describe actions that were ongoing or in progress in the past. It expresses actions happening simultaneously or around the same time in the past, often using time words like "when", "at that moment", or "in the meantime". The past continuous has negative forms using "was/were not" and interrogative forms using "was/were" at the beginning of the question.

1. PAST CONTINUOUS
It is used to express:
- actions which were happening in the past:
You were studying for the Pet exam when I was in
Paris
- narration: I was playing tennis when he came

2. PAST CONTINUOUS
Forma negativa:
I was not coming with you
They weren't saying anything
Forma interrogativa:
Were you trying to annoy me?
When was he going away?

3. PAST CONTINUOUS
Keywords:
- when
- at that moment
- In the meantime
- just