Past simple and Past perfect simple
Tenses differences
Past simle: to show the most recent action
Past perfect simple: to show that something started and finished before something else in the past
Tenses explanation
Present simple
Present perfect simple
Positive: S+ verb past
She swam in the sea
Negative: S+ didn't+ verb inf
She didn't go to the park
Question: [Wh]+ Did+ S+ verb inf
Did you drink juice?
Question: Had+ S+ verb participle
Had you filmed the film?
Negative: S+ hadn't+ verb participle
We hadn't travelled to London
Positive: S+ had+ verb participle
We had played a game
Key words
Present simple: last, yesterday, ago
Present perfect simple: before, by de time