Past simple
 
{Positive}
I, We, They, You, He, She, It → played.    
 
{Negative}
I, We, They, You, He, She, It   →  didn’t play.
 
{Questions}
 Did  →   I, We, They, You, He, She, It  play?
 
 
Keywords:
Week ago, last week,  in 1980, Yesterday.
 
Usages:
​ if one talks about an action which happened in a certain time in the past.
John went to the cafe last week.