Usages of je
Wczoraj zgubiłem też klucze, ale dziś szybko je znalazłem na podłodze.
Yesterday I also lost my keys, but today I quickly found them on the floor.
Ja je czytam w salonie.
I read them in the living room.
Elon.io is an online learning platform
We have an entire course teaching Polish grammar and vocabulary.