Usages of co
To, co mówisz, jest prawdziwe.
What you are saying is true.
To, co czytam, jest prawdziwe.
What I am reading is true.
Nie wiem, po co on bierze dwa kubki.
I don’t know what he is taking two mugs for.
Elon.io is an online learning platform
We have an entire course teaching Polish grammar and vocabulary.