Past Indefinite
Use
Short past action
Past habbits
One past action after another past action
To be
singular
I/She/He = was
You = were
plural
We/You/They = were
(-) form
+ did + not = didn`t
Adverbs
Last
week
month
year
etc.
Yesterday
In 1987
5 months ago
(+) form
(regular) verb + -ed
(irregular) verb second form
(?) form
(?) + did