The past simple
shows us that an action was in the past, not in the present. Regular past simple verbs have -ed at the end (e.g. called, played, arrived). Irregular verbs have a different form, usually with a different vowel sound (e.g. wake → woke, break → broke, feel → felt).
We make the negative with didn't and the infinitive verb.
My parents didn't call me yesterday.
I didn't wake up early this morning.
We make the question form with did and then the subject and infinitive verb.
Did you wake up early this morning?
Did Sam play basketball when he was at university?
The past continuous
shows us that the action was already in progress at a certain time in the past.
What were you doing at 8 p.m. last night? I was studying.
This means that I started studying before 8 p.m. and I continued after 8 p.m.
The past continuous can also show that an activity was in progress for some time, not just for a moment.
We were cleaning the house all morning.
We make the past continuous with was or were and the -ing form of the verb.
She couldn't come to the party. She was working.
Three years ago, we were living in my home town.
I tried to give him some advice, but he wasn't listening.
What were you doing this time last year?