I have been working since 5 p.m.
I worked since 5 p.m.
I have bought a bicycle.
I bought a bicycle.
The cat has already eaten it's food.
The cat already ate it's food.
I have gone on a walk with my pet.
I went on a walk with my pet.
You have told me this story before.
You told me this story before.
My mom has learned how to ride a car in the '80s.
My mom learned how to ride a car in the '80s.
Mam nadzieję że o to chodziło, zdania są takie same tylko zmienione czasy, oba oznaczają to samo.
