Questions & Answers about Czy możesz przeczytać ten tekst jeszcze raz?
Czy marks a yes/no question. It is a very common way to turn a statement into a question in Polish.
So:
- Możesz przeczytać ten tekst jeszcze raz. = You can read this text again.
- Czy możesz przeczytać ten tekst jeszcze raz? = Can you read this text again?
It does not really translate as a separate word here; it just signals that the whole sentence is a question.
Also, in other contexts, czy can mean whether.
Możesz is the 2nd person singular form of móc, which means to be able to / can.
So możesz means you can or you are able to.
In this sentence, it works like English can you...?, which is often used to make a request, not just to ask about ability.