Hi,
We use the past progressive (a.k.a continuous) tense to say what we
were in the middle of doing at a point in time in the past. Here is the structure
of the past progressive tense :
object + was/were + -ing form of a
base verb.
Q: What did you / they do at 5:00PM
yesterday? (a point in time in the past)
A: I was working in my office / They were playing basketball. (in the
middle of working)
You can learn much more about other tenses by using the search feature provided for this site. Its use is similar to other online search engines.