Past Progressive Tense
Also known as past continuous tense, the past progressive is a form of the past tense where an action goes on for a period of time in the past. The past progressive is formed by using the past for of the verb ‘to be’ as an auxiliary verb and by adding the suffix ‘-ing’ to the main verb.
'My teacher was drinking a cup of tea.'
Here we see that the action (drinking) went on for a period of time. We use the past form of the verb ‘to be’ (was) to indicate that the action took place in the past, and the present participle of the main verb (drinking) to indicate that this is a continuous or progressive action.
'We were making friendship bracelets all afternoon.'
Again, there is a past form of the verb ‘to be’ (were) and the present participle of the verb ‘to drink’ (drinking), showing us that the action took place for an extended period of time in the past.